delivered the opinion of the court.

Thomas Rylee filed his declaration in the circuit court of Marshall county against the defendant, the railroad company, charging that the defendant had negligently constructed cattle guards which were so defectively constructed as to permit persons as well as cattle to pass to and fro at will; that his lands are located on either side of the defendant railroad’s track; and further charges that they unlawfully, wrongfully, and negligently failed and refused to construct and maintain the necessary stock gaps or cattle guards of sufficient length, character, and type at the places where the railroad track passes through plaintiff’s land, suing for the statutory penalty and damages in the sum of five hundred dollars. Subsequently plaintiff amended his declaration and sued for the statutory penalty of two hundred fifty dollars and for five hundred dollars for damage to crops and pasture lands on account of the negligent and defective construction of the cattle guards. Issue being joined, the cause was submitted to a jury, and the court peremptorily instructed the jury to find for the plaintiff two hun*762dred fifty dollars as a penalty and submitting the question of damages to the crops and pasture lands to the jury.

There was evidence on behalf of the railroad company that these stock gaps were constructed in a scientific manner, but there appears to be no contradiction that the stock gaps were not reasonably effective to keep out stock, and that this was known for a long time to the agents of the company. We think the peremptory instruction as to the statutory penalty was proper; and while there are numerous questions argued in the brief of counsel, we shall notice but one point. The jury found, in addition to the statutory penalty, the sum of two hundred fifty dollars damages to the crops, farm lands, and pasture lands of the plaintiff. .

The manner in which the proof was submitted to the jury was by permitting the witnesses to say in lump, the amount of damages the plaintiff had sustained on account of the depredations of cattle upon the plaintiff’s lands, without any details as to how the damage arose, without any estimate as to the acreage planted in crops, and as to how many acres were in pasture land, and as to the years in which the damage accrued.

John Bylee, the son of the plaintiff, was the main witness, and we copy from the record his testimony on this point:

££Q. Now, Mr. Bylee, this condition as you have described here (referring to the cattle guards and defective condition thereof), what damage, if any, does it cause the property of Thomas Bylee and his rights to the peaceful and enjoyable possession of it? A. It practically turns out about five hundred or five hundred fifty acres of bottom land,-hay field, and cane in the winter time that cannot be used with any safety.

££Q. Cannot be used for what purpose? A. For stock or pasture.

££Q. For what other purpose can it be used? A. It can be used for farming and take a chance of stock coming in on it.

*763“Q. To what extent have these premises been damaged, Mr. Rylee, and state the nature of it, and how it is brought about, and what is the result and approximate cause of the damage? A. By not being able to use that as a pasture and not being able to keep stock in and other stock out, I would say taking an average amount of stock my father had handled on the place in past years, five hundred dollars a year easily. ’ ’

Three other witnesses testified to the same effect, and upon cross-examination declined to go into any details as to the conditions which existed with reference to these lands, but merely saying that the damage to the plaintiff’s lands was from four hundred dollars to five hundred dollars a year.

The defendant railroad company asked for a peremptory instruction, which was refused by the court.

We think it was error to submit this case to the jury upon this uncertain proof as to the damage accruing to plaintiff. The witnesses, at most, expressed a mere opinion as to the amount of damages sustained, and did not give the jury or the court any basis upon which their estimates were made. No estimate as to the prospects of the crop when injured, or any detail of any specific injury at any specific time. Then, as to the pasture lands, there was no evidence as to the value of pasture lands in that community per month, or as to when the lands, had it not been for these defective stock guards, would have been susceptible of pasturage, if used for pasturage purposes, nor as to how many heád of cattle were available that were deprived of pasturage.

It is true that in such cases witnesses cannot be expected to testify to a mathematical certainty, nor are they bound to rules of accuracy, but there are certain elements entering into the calculation which could be made by proof as to how the damage accrued; as to the number of acres in cultivation in a given year—the court and counsel having, by tacit consent, limited recovery to three years—and the state of cultivation. All these details could have been approximated by witnesses qualified *764to testify as to the amount of damage sustained by the plaintiff, if he sustained damages.

This court laid down a very liberal rule in the case of Yazoo & Mississippi Valley Railroad Co. v. Hubbard, 85 Miss. 480, 37 So. 1011.

In the Hubbard Case the railroad objected to the proof as'made where estimates of losses in bushels and bales, number of acres damaged and injured, the kind of crops planted, how much and how each was injured, time of injury, and the market value of products lost, giving the jury a clear idea upon which themselves to estimate fairly the value of the loss accruing to the plaintiff there.

Mr. Justice Truly, speaking for the court, after setting out the items testified to and estimates of witnesses, said:

‘ ‘ This testimony was accepted by the jury, and we think it ample to sustain a judgment for the amount which was allowed to stand in this case. Mathematical certainty as to the amount of damage suffered is not required in actions of tort of this character. The amount of damage inflicted by injury to, or destruction of, property is, at last, like the value of the property itself, ‘ only a question of estimation, varying as the individual judgments of men may differ.’ . . . Damages must be certain both in their nature and the cause from which they proceed; but the amount in cases like the one here presented— where a crop has been partly destroyed while growing, and partly after maturity, but before gathering—-must, from the very nature of things, be calculated from statements detailing to the jury the exact situation of affairs as they existed at the time of the injury or destruction.”

And citing Sedgwick on Damages, p. 246, and- Sutherland on Damages, and quoting therefrom.

In the instant'case we think witnesses may be permitted to sum up and give the total of their estimates after they have given details which must be known to the witnesses before they would he qualified to make any estimate which would be of substantial value to another in passing upon a question of damage in a case like this.

*765We understand the rule to be that witnesses must testify to the facts upon which a jury may determine the amount of damage sustained. For aught we know, these so-called estimates were mere guesses—not expert testimony, and apparently not based upon facts within the witnesses’ knowledge. If the guess, or estimate, was based upon facts within the knowledge of the witness, then before his estimate may become competent he must give the details and the facts upon which he bases the estimate.

We quote with approval from volume 2, Fourth Edition, Sutherland Damages, section 444:

“Opinions as to Amount of Damages.—Ordinarily a witness is not allowed to give his opinion of the amount of damages a party sustains from a given act or omission, because when he-does so he includes the law as well as the fact. It is the duty of the jury to assess the damages according to the rule of law which it is the province of the court to lay down for their guidance; witnesses are allowed only to furnish the data from which the amount is arrived at, and where the injury consists of distinct elements it is not competent to ask a witness to make a general estimate, but he should be asked to estimate the specific items separately.”

There was nothing so complicated about these farm and pasture lands that would -prevent witnesses who had knowledge from giving the data from which damages, if any, could be fairly estimated by the jury. And in such case if the plaintiff fails to show the distinct elements of damage upon the separate items, it is error to refuse a peremptory instruction. In this case, however, it may be that the plaintiff upon another trial would be able to show data and details upon which their so-called estimates were based. The cause is therefore reversed and remanded.

Reversed and remanded.