delivered the opinion of the Court:

Cora Hender brought suit against the Potomac Electric Power Company, Washington Gaslight Company, and the District of Columbia, alleging that she stepped into an open box in the sidewalk on Eight street, Washington, left uncovered through the negligence of the defendants, and that her foot was thereby injured without fault on her part. Each of the defendants pleaded not guilty, and issue; was joined on their pleas. At the close of the evidence on behalf of plaintiff, defendants separately moved for a directed verdict. The motions of the Potomac company and the District of Columbia were overruled, and the motion of the gas company sustained on the ground that there was not sufficient evidence to show negligence on its part. Thereupon the Potomac company renewed its motion upon the theory that, the gaslight company having been discharged, there could be no proper verdict against the Potomac company. This motion was also overruled, and the action proceeded against the Potomac company and District of Columbia. *39Upon the completion of all the testimony the Potomac company and the District of Colombia, by separate motions, requested tlie court to instruct tbe jury to return a verdict in their favor. These motions were denied. The case was submitted to tbe jury and a verdict returned for the plaintiff'against hoth defendants. The Potomac company filed a motion in arrest of judgment and for a new trial, and the District of Columbia a motion for a new trial. All motions were denied and judgment entered upon the verdict.

It is urged by the Potomac company that the evidence as a whole is not sufficient to sustain a verdict of negligence against it, and that the plaintiff ivas guilty of contributory negligence. The record shows there was an uncovered box 4 or 4| inches in diameter located in tlic sidewalk in what is called a tree space about tí or 8 inches inside of the curb, witli the top slightly below the surface of the ground. The accident occurred about 10 o’clock at night. The plaintiff, JVlrs. llemler, and a woman friend, were standing on the sidewalk beside, the family automobile, and Dr. llemler, her husband, ivas .sitting in the ciar, wheat he jokingly said to the ladies, “Crank the machine.” Mrs. llemler and her friend went into the street and attempted to do so, but failed. They returned to the walk, and as Mrs. llemler moved towards the car for the purpose of entering it, her friend having already taken her seat therein, she; stepped into the open box, caught her foot, and was thrown to the ground, sustaining the injuries complained of.

It is admitted by the evidence that shortly before the accident the Potomac company had dug a conduit about 8 inches deop and from ” to 10 inches wide, adjoining the curb on tbe inside at the place of the accident, for the purpose of laying therein electric light cables. In doing this, gas and water boxes were encountered. One of the company’s workmen said that when he reached the box hi question he could not see the top thereof because it ivas covered with dirt, which he removed with a pick, but lie could see, lie said, tin' side and back of it. lie denied hitting the top, but admitted striking the side with his pick. This box extended somewhat into the trench dug for the conduit. The latter was finished and covered with earth *40about a fortnight before the plaintiff received her injury. A week or thereabouts after the accident, one Dawson, representing the District of Columbia, and the husband of plaintiff, dug into the loose earth surrounding the box in search for the missing cover and found buried there several pieces of iron. A witness testified that she was accustomed to pass near the box about two or three times a week, and that just before the Potomac company began work on the conduit the box was covered. She also said that, beginning just after the Potomac workmen had left, she passed by the place every day, and the box was then without a cover. Her attention was called to the box once by having stumbled into it. She never saw any cover upon the box from the time she first observed it open until the time of the accident. .

This evidence tended to show at least that the box was covered just before the Potomac company commenced work on the conduit; that the cover was subsequently removed, broken, and buried in the loose earth around the box before the accident took place; that the Potomac company had dug up the earth surrounding the box in part and replaced it, -and had also removed earth from the top of the box with a pick before the plaintiff’s injury. There is no evidence that anyone else interfered with the box or the earth thereabouts. If the. jury found these things as facts, they might then draw from them such inferences as were logically deduciblo. (Looney v. Metropolitan R. Co. 200 U. S. 480, 50 L. ed. 564, 26 Sup. Ct. Rep. 303, 19 Am. Neg. Rep. 627). They could have rightly inferred that the top was removed, broken, and buried in the earth by the employees of the Potomac company, and the open box left without guard to protect pedestrians rightfully using the sidewalk from stepping into it, and in so doing they would not be violating the rule against basing a presumption upon a presumption. We think, therefore, that there was sufficient evidence of negligence on the part of the Potomac company to carry the case to the jury, unless it was conclusively established that plaintiff’s failure to take proper care of herself contributed to the injury.

The accident happened, as we have just stated, about 10 *41o’clock at night, in the month of June, when the trees were in full leaf. The uncovered box was in a tree space; hence wo may assume beneath the spreading branches. There was a light on the corner of the same side of the street, but how far from the box does not appear. Some light came from the automobile to the tree space. The place was not entirely dark. Nor was the box perfectly obvious to anybody, “unless they had had their attention drawn to it.” Some two weeks before the accident, plaintiff, as she was going along the street, saw7 the open box but “did not pay any attention to it.” She might have told her husband that it was a dangerous place and ought to be fixed. Witnesses testified that she admitted after the accident that she had made sncli a statement to her husband. He denied any recollection of her having done so. This is all the testimony upon the subject. Was it sufficient to warrant the court in declaring as a matter of law7 that plaintiff should he charged with contributory negligence ? Questions of fact are to he determined by the jury, but wdiere the probative facts are undisputed, and reasonable men can draw7 but one conclusion therefrom, the question is one of law for the court. This is axiomatic. The Potomac company urges that, since the plaintiff admitted that about two weeks before the accident she saw the uncovered box and that she might have told her husband it was dangerous and ought to he fixed, the court should have» instructed the jury that she was guilty of contributory negligence. Speaking 1o a similar question, the Supreme Court of the United States said: “When analyzed, the proposition comes to this, — that no person can, as a matter of law7, wdthout assuming all the risk, use the streets of a municipality wdiere he knows of a defect therein, even although it he that in the exorcise of a sound judgment, it might be deemed that with ordinary care and prudence the street could he used with safety. The result of admitting the doctrine would he to hold that all persons in making use of the public streets assumed all risks possibly to arise from every known defect or danger.” The opinion continues: “Concluding as we do that the fact that tin* plaintiff, when she elected to descend the steps from her residence to reach the sidewalk, had knowledge of the existence of *42the uncovered water box at the foot of the steps, was not alone .sufficient to charge her with contributory negligence as a matter of law, it follows that the judgment below was erroneous if it rested upon such theory.” (Mosheuvel v. District of Columbia, 191 U. S. 247, 48 L. ed. 170, 24 Sup. Ct. Rep. 57, 15 Am. Neg. Rep. 246.) Here the plaintiff was not conscious of the existence of the defective condition at the time of the injury, and relied upon the presumption that the sidewalk was free from defect either in it or so near to it as to be dangerous, and was suitable at the time for the purpose for which it was intended, — the passage of pedestrians. In the Mosheuvel Case, plaintiff was aware of the danger when she attempted to use the sidewalk, yet the court said that it could not be correctly asserted that all reasonable minds must draw the conclusion that contributory negligence necessarily resulted as an act of law in attempting to step over the water box to the sidewalk. Wc think the rule of that case is applicable to the case at bar, and therefore that it would have been error for the lower court to have told the jury that plaintiff was guilty of contributory negligence.

With respect to the motion of the District of Columbia, the evidence shows that the uncovered box was in that condition in one of the thickly settled portions of the city for more than two weeks before the accident happened. This was sufficient to warrant the jury in finding that the District had, or should have had, notice thereof.

Wo now come to a discussion of the action 'of the court in denying certain prayers for instructions made by the Potomac company. It asked the court by its second request to charge, the jury in substance that, if the plaintiff knew, of the location of the box, its defective condition, that it was dangerous and had not been repaired, the jury should find for the defendants. This is exactly what the Supreme Court decided in the Mosheuvel Case, supra, should not be done under circumstances similar to iliose disclosed by the record hi this case.

The next request made by the Potomac company upon which it predicates error was one in which the court was asked to tell the jury that, before they could find for the plaintiff, they must *43be convinced that the top of the gas box mentioned in the declaration ‘Svas removed therefrom by an employee of the defendant Potomac Electric Power Company while engaged in the performance of his duty as such employee, and that he, in the exercise of due care, know or should have known that the said top had been removed and had not been restored.” If he removed the top, it was immaterial whether he knew or not that it had been restored. The duty for breach of which the Potomac company was sued rested upon it, and the company cannot escape responsibility by showing that the employee who removed the cover did not have reason to believe that it had not been restored. The obligation of the company was correctly stated to the jury by the court in these words: “Its only duty was not to carelessly break or remove; the top therefrom; and unless the jury believe from a preponderance of the whole evidence in this case that the said top was actually broken or removed by an employee of the Pofomac Electric Company during the course of the discharge of his duties as such employee, then their verdict should he in favor of the Potomac Electric Company.” There was no error in refusing the prayer.

Another prayer said in effect that it was not the duty of the Potomac company to prove how or when or by whom the top covering the box was broken, or that it was broken by someone else than its employee, but that the burden was upon the plaintiff to show that the Potomac company broke it; and that, unless the whole evidence established this fact, the verdict must ho for the defendant even though the jury might believe that the top was broken wliile 1he work of the Potomac company was in progress, and although there may not be sufficient evidence to fasten the breakage upon anyone else, and even though the jury might believe that it was possible or even probable that the top might have been broken by some employee of the Potomac Electric Power Company. This subject was fully covered hv the instruction of the court quoted above, wherein the jury was told that, before it could find against the Potomac company, it must find as a matter of fact, not as a possibility or a probability, that the Potomac company was guilty of the negligence charged.

*44Finally it is argued tlmt the court erred in directing a verdict in favor of the gaslight company, while at the same time overruling like motions tendered on behalf of the other defendants, and in overruling the motion of the Potomac company in arrest of judgment, based upon the ground that the causes of action stated in the declaration and as made out by the evidence did not constitute a case of joint liability. At the close of the plaintiff’s case there was not a particle of evidence tending to connect the gaslight company with the accident. The Potomac company in its brief says that the pieces of iron found buried in the earth near the box had on them the letters W. G. L. C., and from this, it argues, the jury should have been permitted to infer that the box belonged to the gas company. But these pieces of iron are not attached to the record, and therefore we cannot consider them as evidence. It is also urged in this regard that, if the court liad not sustained the motion eliminating the gas company when the plaintiff closed her case, the testimony of the defendants given later would have shown that the initials W. G. L. 0. on the pieces of iron indicated the gas company, and that the box was its property. But the gas company, when the plaintiff rested her case, had a right to invoke the judgment of the court as to whether or not there was any evidence in the record tending to show that it was responsible for the accident, and thereupon it became the duty of the court to rule upon the question presented. There being no evidence at all against the gas company, as we have just observed above, the court was obliged to dismiss it from the case. Nor could the right of the gas company to be discharged be affected by the fact, if such it were, that its discharge might work injury to one of its codefendants. This must be obvious without further discussion. Besides, the Potomac company admits in its brief that the causes of action charged in the declaration do not constitute a case of joint liability albeit the defendants are sued jointly. There is a difference between a case in which two or more defendants are sued jointly for a several tort and one in which they are charged with a joint tort. In the former case it is the law that, if “the, evidence is not sufficient to hold one, there may be a discontinuance as to that one and the trial may *45proceed as to the other.” (Dutton, v. Lansdowne, 198 Pa. 563, 53 L.R.A. 469, 82 Am. St. Rep. 814, 48 Atl. 494; Capital Traction Co. v. Vawter, 37 App. D. C. 29, Ann. Cas. 1912D, 1059.

Finally it is argued that the declaration is defective in that the tort therein declared was not a joint tort, and hence a joint action could not be maintained against all three or any two of the defendants. This question was raised for the first time, so far as the record discloses, by the motion in arrest of judgment and for a new trial. It is a defect of form and not substance. The declaration clearly and definitely informed the defendants of the grounds upon which the plaintiff sought to recover judgment against them. They were willing to be tried together for the negligence charged. It is too late after verdict to find fault with the form of the declaration. Belated attacks upon pleadings are not favored. In considering them courts liberally construe the pleadings, giving the plaintiff the benefit of every implication that can be drawn therefrom in his favor. (Baker v. Warner, 231 U. S. 588, 58 L. ed. 384, 34 Sup. Ct. Rep. 175; see also Ward v. Merriam, 193 Mass. 135, 78 N. E. 745; Hendon v. North Carolina, R. Co. 127 N. C. 110, 37 S. E. 155; Hofheimer v. Campbell, 59 N. Y. 269; United States v. Lee Yen Tai, 51 C. C. A. 299, 113 Fed. 465.) Whether the complaint now made by the Potomac company is placed upon the ground that there was a misjoinder of parties or a misjoinder of causes of action, it is the rule that objections upon that score must be raised at the earliest opportunity or else they will be regarded as waived. (Latham v. McGinnis, 29 Ill. App. 152; Hudson v. Wright, 204 Mo. 412, 103 S. W. 8; Helmuth v. Bell, 150 Ill. 263, 37 N. E. 230.

The Potomac company cites Mooney v. Edison Electric Illuminating Co. 185 Mass. 547, 70 N. E. 933, 16 Am. Neg. Rep. 360, and Dutton v. Lansdowne, 198 Pa. 563, 53 L.R.A. 469, 82 Am. St. Rep. 814, 48 Atl. 484, and quotes from them at large in support of its argument. In the M ooney Case the question was raised by demurrer and in the Dutton Case the declaration was for a joint tort. Here the declaration, as construed by appellant, is not for a joint tort, but for a several *46one. Tins distinction is well brought out in tlie Duilon Case, whore it is said: “If two defendants be sued joiidli) for a tort and the evidence is -not sufficient to bold one, there may be a discontinuance as to that one and the trial may proceed as to the other, * * * but where the declaration is for a joint tort and the case goes to the jury as against both defendants, if under such circumstances the evidence fails to show that the defendants were joint, tort-feasors it is error to permit a recovery against one or both.” There is nothing in either of the cases to support the argument based upon them by the appellant. Moreover, the Potomac company was not prejudiced in any way by the action of the court in permitting a joint verdict against it and the District of Columbia; for by the instructions under which the case was submitted to the jury they were told that they could not return a verdict against the Potomac company and the District unless they found that the defective condition complained of was the result of the negligence of the Potomac company. The negligence of the Potomac company was treated as primary; that of the District as secondary. Until the one -was found, the other could not be. In view of this, the rights of the Potomac company were in no way impaired by the fact that the jury also found that the District was responsible to the plaintiff. This disposes of all questions raised by the Potomac company.

The District of Columbia adopted the brief and argument of the Potomac company with respect to the points which we have considered, and urged nothing in addition. Since we have held that none of those points was well taken as to the Potomac company, the same ruling follows with respect to the District of Columbia. There is no error in the record, and the case is affirmed, with costs. Affirmed.