*611 Barsteeill, J.

Second Street in the city of Wilmington extends north and south and Campbell Street extends east and west. The boundary line of the railroad property runs from southeast «to northwest and intersects Second Street south of the point where Campbell Street extended would intersect said street, the point where said streets would intersect if extended being on the railroad property. Thus, Second Street terminates in a dead end at the northeasterly boundary line of the railroad property.

The evidence fails to disclose with any degree of certainty whether the retaining wall at the end of Second Street is on railroad property. It does not disclose with any considerable degree of certainty the party who constructed the wall. It does show, however, that there is a cold storage plant on the north side of Second Street adjacent to the railroad property and that the wall was built at'the same time the cold storage plant was constructed, seemingly as an extension of the foundation wall of the cold storage plant building. It further discloses that this retaining wall was constructed in 1912 and that at that time Second Street from Red Cross Street north had not been paved-, that this section of Second Street sloped downward toward the railroad property; and that rain water had washed away the surface of this portion of Second Street to the extent that at the boundary of the railroad property it was practically on a level. It further discloses that thereafter the city improved this section of Second Street and paved it with Belgium blocks. As a part of this improvement the surface was filled in and leveled so that the Belgium block pavement was about one foot below the top of the retaining wall. It appears, therefore, that if the condition existing at the north end of Second Street created a dangerous situation and evidenced a want of due care, this situation was created by the city and not by the defendant railroad company. The duty to take such measures as were necessary to protect the traveling public against any danger that might exist due to the fact that the wall was only one foot above the surface of the improved street rested upon the city and not upon the defendant railroad company. We are of the opinion, therefore, that there was no error in the judgment of the court dismissing this action as of nonsuit as against the'defendant railroad company.

There is evidence that Second Street as improved from Red Cross Street to the retaining wall is down grade. It further appears that sand, leaves and other debris had been washed down against the retaining wall and accumulated to such an extent that the existence of the wall was concealed and the street appeared to be on a level. The plaintiff further offered evidence tending to show that there was no barrier erected at or near the retaining wall to protect the traveling public against the hazard caused by the sudden drop in level between Second *612 Street and the railroad property, and that the city did not maintain or keep any light or other device at said point to warn the traveling public thereof. •

On the night the plaintiff was injured his father, the operator of the car, drove northwardly on Second Street over the retaining wall on to the railroad property, the car going across the first tracks of the railroad and stopping on the second tracks. The defendant offered evidence tending to show that at the time the driver of the car was under the influence of liquor to such an extent that he did not know what he was about; that he was warned that he was off his course and was approaching the end of Second Street, but that he was unable to stop his car due to his drunken condition and the careless and indifferent method of operation of the car.

If the conditions existing at the north terminus of Second Street are as the plaintiff’s evidence would indicate the city was negligent in the manner in which it maintained the same. Willis v. New Bern, 191 N. C., 507, 132 S. E., 286, is directly in point. What is there said about the duty of a city in maintaining the terminus of a street in a reasonably safe condition might well be repeated here. In that case, Brogden, J., speaking for the Court, in part says: “It is essential to the public safety that the terminus of a street shall be kept in as reasonably safe condition as any other portion thereof, for the manifest reason that it would be obviously futile to charge municipal authorities with the duty of keeping a street in a reasonably safe condition and yet permit it to terminate abruptly in an unsafe and dangerous manner. It would be a ruthless doctrine to allow a public highway to be improved for its entire length and thereby invite a traveler thereon, and, after being lulled into a sense of safety, to be suddenly put to death by an unguarded embankment, precipice, or other dangerous defect, when such defect was known or could have been discovered by the exercise of reasonable diligence, and when, of course, the traveler was using due care for his own safety.” We adopt with approval the further statements of this distinguished former Associate Justice of this Court pertaining to the duty of a city in respect to the terminus of a street without further quotation therefrom. In support thereof, we refer to the cases he cites. See also Michaux v. Rocky Mount, 193 N. C., 550, 137 S. E., 663, and Pickett v. R. R., 200 N. C., 750, 158 S. E., 398.

The court below, in its charge, fully instructed the jury upon the law and the evidence in respect to the plaintiff’s contention that the negligence of the city was the sole proximate cause of his injury. It likewise fully instructed the jury upon the contention of the defendant that the' drunken condition of the operator of the car and his failure to exercise due care and caution was the sole proximate cause of plaintiff’s *613 injury, constituting an efficient intervening act of negligence which, insulated the negligence on the part of the defendant and exculpated it from any liability for plaintiff’s injuries.

The plaintiff, in apt time, excepted to the charge for that it does not comply with the mandatory provision of C. S., 564, in that the court failed to declare and explain in a plain and correct manner the law arising upon the evidence, in that the court did not declare and explain the law under the doctrine of concurrent negligence and apply such law to the facts in this case.

We are of the opinion that this exception must be sustained. There is evidence of negligence on the part of the defendant city and there is likewise evidence of negligence on the part of the driver, whose negligence is not attributable to the plaintiff. Albritton v. Hill, 190 N. C., 429, 130 S. E., 5. The question of proximate cause was for the jury.

Where, in this type of cases, there is evidence of negligence on the part of the defendant and likewise evidence of negligence of a third party, which negligence is not attributable to the plaintiff, the defendant is liable if its negligent act constituted one of two proximate causes of the injury. If the defendant’s negligence contributed to plaintiff’s injury as one of the proximate causes thereof the defendant is liable notwithstanding the negligence of the third party. Albritton v. Hill, supra. If the negligence of the owner and driver of the car was the sole and only proximate cause of plaintiff’s injury the defendant would not be liable; for, in that event, the defendant’s negligence would not have been one of the proximate causes of the plaintiff’s injury. Bagwell v. R. R., 167 N. C., 615, 83 S. E., 814; Evans v. Construction Co., 194 N. C., 31, 138 S. E., 411. If, however, the negligence of the city concurring with the negligence of the third party constituted the proximate cause of plaintiff’s injury it would be liable, because the defendant cannot be excused from liability unless the total causal negligence or proximate cause be attributable to another or others. When two efficient proximate causes contribute to an injury, if defendant’s negligent act brought about one of such causes, it is liable. Evans v. Construction Co., supra; Wood v. Public Service Corporation, 174 N. C., 697, and cases there cited; Albritton v. Hill, supra; Hanes v. Utilities Co., 191 N. C., 13, 131 S. E., 402.

The law of concurrent negligence, as thus stated, is applicable to the conflicting evidence in this case. The plaintiff has a right to rely thereon, and it was the duty of the court to apply this doctrine of the law to the evidence and to declare and explain the law of concurrent negligence as it applied to the evidence without any special prayer. It is part of the law of the case.

The fact that the jury found by its verdict that the plaintiff was not injured by the negligence of the defendant city does not render the *614 failure of tbe court to charge on the doctrine of concurrent negligence immaterial or harmless. The jury was given the choice of finding either that the negligence of the city, if they found such existed, was the sole proximate cause of plaintiff’s injury, or that the negligence of the driver, if such was established, was the sole proximate cause. The jury was not given an opportunity to consider the evidence under the law which permitted it to find that the negligence, if any, of the city was .only one of the proximate causes of plaintiff’s injury and that such negligence, concurring with that of the driver, constituted the efficient proximate cause of plaintiff’s injury. The evidence in this case is such as entitles the plaintiff to have this view of the law stated and explained and applied to the evidence by the judge in the trial of his cause.

Affirmed as to defendant Railroad Company.

New trial as to defendant City of Wilmington.