The opinion of the court was delivered by

Had this been an action brought by the defen-' dant against the plaintiff for use and occupation, such a question as Was proposed’ to be put to the witness, might have been very proper ; because after having shown that the plaintiff had occupied the property by the permission of the defendant, he would have been entitled to recover, without proving that the plaintiff was to pay 'to1 him any certain or fixed sum for the same, whatever the jury might have thought would have been a reasonable compensation ; and to inform the consciences of the jury on that point, the testimony Would have been strictly relevant and unexceptionable. But I apprehend that in this action, the question, what would be a reasona-ble rent ? did and could not properly arise. Because, without an agreement fixing upon a certain rent to be paid for the property, .Arthur Carr, or his bailiff, the defendant, had no right to distrain or seize upon and take the plaintiff’s goods. A distress can only be made where, by the agreement, the rent to be paid is certain and fixed, so that the tenant may know, in case he be threatened with a distress, what he is to pay to prevent it, or in case his good^ shall be distrained, what sum to tender in order to retain them. Where this is not the case, to permita landlord’to distrain for whatever sum he might say was reasonable, would introduce the greatest imaginable oppression and injustice. On the other hand, it would not do to leave the sum to be fixed by the tenant, who it may be supposed, from interested motives, would seldom be dis-> posed to do justice to his landlord. It is necessary, therefore, that the claim of the landlord in this respect, should be ascertained by the agreement itself, under which the property is let. On the trial *32of this Cause it then became necessary that the defendant,- in xna>> king out his justification, should prove that a certain rent was to' have been paid by the plaintiff to Carr for the property; and how could the opinion of the witness, as to what sum would have been a reasdnablfe rent Contribute to prove, in any degree, that the plaintiff had agreed to pay that sum* whatever it- might be? The opinion of different men will vary less Or more on such a poiiit; and such testimony cannot, therefore, lead to absolute certainty as to the amount of rent that was to have been paid; which I consider indispensably necessary.

Hence, it appears, that the court below erred in admitting the testimony iff Mr. Barclay, which was objected to.

After the Close of the testimony o'n bdth sides, tlie' plaintiff’s’ counsel among other things, requested the court to é'hafige the jury,’ that the defendant, to justify himself, must prove that rent -was in arrear.- In answer to this, the court told the jury that the defendant was not bound to prove the rent in.arrear. And this is assigned by the plaintiff’s counsel for the third error! It is difficult to conceive upon what principle it was, that the court belóW gave this1 direction to the jury. The defendant rested his defence entirely upo'n his justification-, Which was clearly o"f an affirmative Character; and that rent was due, and irt arreaí by-the plaintiff to JirtUui' Carr, appears to me to have been the very jiát of it. No rule'is better established than this; that the bhrden of proof lies Upon hito, who is in the affirmative in pleading. The defendant Was So in this cáse, and I therefore think there was error in' the dnswbr of the c'ourt below upon this point to the jufy.

The plaintiff’s counsel, also, requested the" court to charge- the jufy that the testimony o'f John Y. Barclay, Esq. did' not prove a lease so as to justify the defendant in this case; In feply to-which,1 the court told the jury,- it Was not the province of the'court to say what weight it ought to have with the jury. This áfiswer of the court has been assigned for the fourth error! The answer is per-» haps notvery difetítand explicit; yet I cannot say certainly that there is errof in it. When the testimony is of a purely párol character, ánd submitted to the jury by the parties' for their Consideration,1 generally, I think it belongs to the jury to decide, what conclusions are to be drawn fro'm it, and always to de’cide Upon the weight Or degree of credit that Shall be given to’ it. The plaintiff might have, if he had pleaáed, withdrawn the consideration of this'testimony from the.jury, by demurring to it; .and in this way,' háVíí compelled the court to' decide on the effect of it. This Course,' however, he did not think proper to take; ánd I am not Satisfied that he had a right to require the decision of the court upon the" effect of it, in any other way. If So, hé'had no right to1 require thb Court to declare the effect of it to the jury, and to direct them i-ti the conclusions which they ought to draw from -it.

*33The counsel for the plaintiff, in the next place, requested the! Court to instruct the jury, that if Arthur Carr had no right to distrain his warrant could be no justification to the defendant for doing so. In answer to which, the court directed the jury, that whether Carr had or had not a right to distrain, his warrant to the defendant, supposing him to have been a constable, was a sufficient justification to him for all his proceedings under it. This direction is assigned for the fifth and last error, which also goes to negative the existence in fact of the second error assigned; and Which I therefore omitted to notice in its order. •

I- am altogether unable to discover any principle of law or justice, upon which this part of the charge of the court below can bd Supported. There is certainly no good reason for saying that Carr-, who claimed to be the landlord of the plaintiff, could delegate d power to-the defendant which he did not possess himself. If t certain rent had been due, and in arrear from the'defendant to Carr, he could have made the distress himself in person, without thd aid of an officer of any kind; or he might, by his warrant, as he did in this caso, have appointed the defendant, or any other person, not a constable or officer, his bailiff, or agent, or attorney in fact, to distrain in his name the goods of the defendant, for the rent due and in arrear. But if no rent Were owing to him, his distress of the defendant’s goods woüld be most clearly illegal and unwarrantable; and consequently, the distress by his bailiff or agent no less so. In case of a distress by a landlord, for rent due and in arr'ear, if the tenant or owner of the'goods should not, within the space of five days after such distress taken replevy the goods, they are,'under the act of assembly of the 21st of March, 1772, to be appraised; at which the sheriff, or under sheriff, or h constable, must be present, aiding and assisting, and not before. So if any other than the sheriff, under sheriff, or a constable, be made bailiff, and distrain the goods of the tenant, such an officer must be. called in to the appraisement of the goods, and to superintend and conduct the sale of them in all cases as directed by this act. But no part of this act countenances the idea that a constable, or any other person who undertakés to act as bailiff for the landlord in making the distress, shall be excused or justified in doing so, where no rent can be shown to be due and in arrear. So far from it, that the third section expressly provides, “That in case any distress ánd sale shall be made by virtue of this act, for rent pretended to be in arrear and due, when in truth no rent shall appear to be in arrear or due to the person or persons distraining, or to him or them in whose name or names, or right, such distress shall be taken as aforesaid, that then the owner of such goods and chattels distrained and sold as aforesaid, his executors or administrators shall and miy, by action of trespass-, or upon the case, to be brought against the *34person or persons so distraining, any or either of them, his or' their executors or administrators, recover double the value of ths goods or chattels so distrained and sold, together with full costs of suit.” Here, by this section of the act, it will be perceived, that it is the person or persons distraining who are made liable to the action, and double the value of the goods distrained and sold, ins case there bé no rent due and in arrear; and not the person or persons in whose names the distress shall be made. The charge of the court below in this particular, was directly against the act, and every principle of the common law.

There are cases indeed when constables, acting in obedience to warrants under the hands and seals of justices of the peace, upon complying with the requisitions of an act of the assembly, passed the 21st of March, 1772, entitled ££An act for rendering justices of the peace more safe in the execution of their office, and for indemnifying constables and others acting in obedience to their warrants, will be excused; but that act has no relation to the present ease. There was no warrant of a justice of the peace in this ease;, nor could a justice of the peace, as such, have given a warrant authorizing a distress for rent due and in arrear.

Judgment reversed, and a venire de novo awarded.