OPINION OP THE COURT.

POPE, J.

(After stating the facts.) — The principal assignment of error is that based upon the action of the court in instructing the jury to find for the defendant. In determining ^his matter we do not find it necessary to enter into a discussion in detail of all the testimony given on the trial, but bearing in mind the rule as to directing a verdict laid down by this court in Armstrong, v. Aragon, 79 Pac. 291, and cases there cited, we think there was a case for the jury on the record here presented and that the court erred in withdrawing the case from the jury. The testimony in brief shows that the plaintiffs were in the quiet possession of the premises under a lease from the defendant Weinman, when, on June 30, 1902, the east wall of the building fell, the building thereon situated was untenantable and the stock and fixtures of the plaintiffs were damaged. It is further shown that some weeks prior to the casualty the defendant Barnett, who was the owner of lot one, adjoining the leased premises on the east, had entered into an agreement with Weinman (to which plaintiffs were not parties) wherebv it was agreed, that Barnett in the construction of a building on lot one might construct a party wall on the west side thereof, to be located half upon his lot and half upon lot two occupied by the plaintiffs. This party wall contract was tendered in evidence by plaintiffs, but upon objection was held inadmissible by the court. This action of the court constitutes the bases for one of the assignments of error. It was further shown by the evidence, that pursuant to the party wall contract between himself and Weinman, Barnett on June 5, 1902, entered into a contract with one Grande, whereby the latter was to excavate for and complete the stone work required in the basement on lot one, including said party wall, in accordance with the plans and specifications of a certain Le Driere, the architect. This contract is in evidence, as are also the plans and specifications. From the latter it appears that the excavation was to be eight feet below the sidewalk grade and the footing course of the party wall was to be forty inches wide, one-half of which, or twenty inches, was to be on lot two. The destroyed building came within two and a half inches of the east side of the lot, so that the contract was .for an excavation of 17% inches under the drug store building. As a safe guard against the fall of the building by .reason of such undermining, there was a provision that the excavating should be done in sections, not over five feet long, and there was also provision for the use of timber props where necessary to protect property the old wall from settlement. It was under the contract, plans and specifications thus outlined, that the contractor proceeded to excavate. Apparently the only excavation made under the wall of the destroyed building was at the north end of the east wall next to the sidewalk, where for a depth of about eight feet and extending back southward a distance of five feet 'an excavation was made under the drug store wall, a distance variously estimated at from three to eighteen inches. There was testimony to the effect that work was being done at this point on the very day the building fell. The building fell about five o’clock in the afternoon. The evidence seems to show that the first. indication • of trouble was a vertical breach on the top of the wall two or three feet long, about two inches wide at the top and smaller as it extended downward, this breach being about 55 feet south from the street and this, fifty feet south of the most southerly point at which the wall was undermined. Within ten minutes of the appearance of-this breach the whole fifty-five feet of wall northward had fallen, that to the south remaining standing. One of the eye witnesses, Sandoval, testifies, that during the ten minutes interval some dirt and stones fell from the top of the wall, the front part also cracked and the stone foundation on the corner toward the north side (being the comer of the undermining) fell in and “the whole thing fell at once.” Ruppe, the other eye witness, testifies that during that interval he noticed the sand trickling through the show window (at the north front) from above and the show windows were pushed to the front and five or six feet of - the front of the wall broke off and toppled over into the street with the front. and, the foundation fell in at this northeast comer. There is a .difference between the witnesses as to just how the wall fell. Perhaps the more intelligent testimony was to the effect that the top of the wall fell inward and westward without shifting north or south and the bottom outward, but the testimony is contradictory upon this point. The proof shows, that at the northeast corner of the building, where the foundation had been undermined ■and subsequently fell in, there was located and destroyed an electric piano, which according to the bill of particulars filed, was worth $600, and there were .a number of additional articles, at that point, of more or less value, also destroyed. The evidence also showed that the wall in question was not plumb but bagged westward as much as nine inches. One of the witnesses, Sandoval, a stone and adobe mason of fifteen years’ experience, testified upon cross-examination, that the cause of the falling of the wall was the fact of its being undermined at the sidewalk. Plaintiffs attempted to present further testimony updn this line from one Hyden, who testified that he had been for eight years a contractor and builder, familiar with the construction of buildings, walls and foundations generally, and of this building in particular, and from one Pitt Eoss, who testified that he had been a civil engineer for twenty years, familiar with the premises; but the court sustained the objection to this testimony, ’ upon which action there is likewise an assignment of error. The theory upon which the defendants moved for and secured an instruction in their favor apparently was, that the physical facts as above outlined, rendered it impossible that the fall of the walls or any part thereof, could have resulted from the five foot undermining at the north end of the east wall. It is urged that the fact that the first breach in the wall appeared fifty feet back from the undermined section, and the manner in which the wall toppled and fell, exclude the idea that it could have resulted from the undermining, but established that it must necessarily have been caused by the removal of the lateral support formerly afforded by the wall of the building on lot number one, taken in connection with the fact that the east wall of the drug store was some inches out of plumb. The wall on lot one, it may be remarked, had been taken down some three or four weeks before the fall of the building.

We are unable to concur in the view of the matter taken by the court below. We cannot say, as a matter of law, that the building could not have fallen for the reasons testified to by the witness Sandoval, to-wit, the excavation at its northeast corner, nor do we believe that it was within the province of the court below to withdraw the determination of the question of why it fell, from the jury. The facts of the case, in our judgment, bring it within the rule laid down in the much cited case of Milwaukee, etc.,, Railway Co. v. Kellogg, 94 IT. S. 469, where it is said that "what is the proximate cause of an injury, is ordinarily a question for the jury,” using their experience as business men, • aided by expert opinion properly presented, it was for the jury to determine whether, from all the facts and circumstances disclosed in evidence, the theory of the plaintiffs was correct; or whether, as argued by the defendants, the first indication of trouble at a point in the wall fifty feet from the excavation was proof positive that the undermining had nothing to do with the fall of the wall. One of the witnesses for the plaintiff, a builder of experience with adobe walls, in effect testified, without objection, that such an excavation in a wall of this character could and did produce such a breach followed, by such a fall. We are unable to say, as a matter of law, that this theory was incorrect. That was a question peculiarly for the jury. It was for the jury to determine whether, under all the proofs in the case, when tested by the charge of the court, the excavation'under the northeast corner was the proximate cause of this damage to plaintiffs. We are further of the opinion that, while the court should have permitted the whole range of facts to go to the jury, it is even clearer that there were questions for the jury as to a portion of it, to-wit, that connected with the damage to the articles in the northeast corner of the building. The testimony shows that while a large portion of the articles along the east wall remained in place and were simply crushed down, the floor at the northeast corner, following the stone foundation, fell into the excavation which had been made under the five feet of foundation at that corner. The result was damage to some very expensive articles at that point in the store, among others, as we have seen, a piano of very considerable value. Even assuming that the breach at the fifty foot point on the wall was the result of the removal of lateral support, that cannot be invoked in entire explanation of the falling in of the foundation at the northeast corner,'and the very considerable damage resulting therefrom. As to this the jury would have been justified on the record here presented, in concluding that it flowed directly and proximately from the trespass upon the plaintiffs’ leasehold in the tmdermining of their east wall. The fact that an element such as the removal of lateral support, with which defendants had no concern, co-operated with an element such as the unauthorized destruction of a foundation — with which the defendants had every concern — cannot relieve them from responsibility for the latter. The court below, considering the facts of the case to render unnecessary a consideration of the extent of damages, did not permit inquiry into the various articles destroyed, but enough is developed from this record to show prima facie a very substantial iniury to plaintiffs by reason of the northeast corner excavation itself, and at the very least, that feature of the case should have gone to the jury under appropriate instructions. In the consideration of the case we have made no distinction between the defendant Barnett, the alleged active trespasser, and the lessor, Weinman, under whose authority and by whos consent it is alleged Barnett contracted for the alleged invasion of plaintiffs’ leasehold. The extent to which Weinman stands upon the same footing as Barnett, depends upon the terms of his party wall contract. The latter was tendered in evidence and ruled out by the court, upon what theory we are unable to determine. Counsel for defendant Weinman, apparently abandoning any defense of this ruling, treats this contract as in evidence and' argues quite fully upon its legal effect. We decline to follow this discussion or, to hold at this time what the legal effect of that instrument is for the reason that these questions were not considered by the court below. The trial court held simply, that the contract was inadmissible'for any purpose and ruled it out, and so holding, presumably declined to consider its effect. We likewise content ourselves with passing upon its admissibility and reserve to the court below, upon a new trial, the determination of its weight. Holding, as we do, that this contract was highly relevant as showing the connection of the defendant, Weinman,' with the alleged trespass, we are of the opinion that the trial court erred in excluding it from the jury.

The cause is accordingly reversed as to- both defendants and remanded for a new trial..

William J. Mills, C. J., John R. McFie, A. J., Frank W. Parker, A. J., Edward A. Mann, A. J., concur. Abbott, A. J., not having heard the argument took no part in this opinion.