Ude had been left far behind, and we were bowling along on a road as level as a floor, when we saw two wolves quietly watching us half a mile away. We had agreed not to chase antelope again; but wolves were fair game at any time. Moreover, we were particularly glad to be able to check our records as to how fast a wolf can run when conditions are in its favor. Coltman signaled Mac to await us with the others, and we swung toward the animals which were trotting slowly westward, now and then stopping to look back as though reluctant to leave such an unusual exhibition as the car was giving them. A few moments later, however, they decided that curiosity might prove dangerous and began to run in earnest.

They separated almost immediately, and we raced after the larger of the two, a huge fellow with rangy legs which carried him forward in a long, swinging lope. The ground was perfect for the car, and the speedometer registered forty miles an hour. He had a thousand-yard start, but we gained rapidly, and I estimated that he never reached a greater speed than thirty miles an hour. Charles was very anxious to kill the brute from the motor with his .45 caliber automatic pistol, and I promised not to shoot.

The wolf was running low to the ground, his head a little to one side watching us with one bloodshot eye. He was giving us a great race, but the odds were all against him, and finally we had him right beside the motor. Leaning far out, Coltman fired quickly. The bullet struck just behind the brute, and he swerved sharply, missing the right front wheel by a scant six inches. Before Charles could turn the car he had gained three hundred yards, but we reached him again in little more than a mile. As Coltman was about to shoot a second time, the wolf suddenly dropped from sight. Almost on the instant the car plunged over a bank four feet in height, landed with a tremendous shock—and kept on! Charles had seen the danger in a flash, and had thrown his body against the wheel to hold it steady. Had he not been an expert driver we should inevitably have turned upside down and probably all would have been killed.

We stopped an instant to inspect the springs, but by a miracle not a leaf was broken. The wolf halted, too, and we could see him standing on a gentle rise with drooping head, his gray sides heaving. He seemed to be "all in," but to our amazement he was off again like the wind even before the car had started. During the last three miles the ground had been changing rapidly, and we soon reached a stony plain where there was imminent danger of smashing a front wheel. The wolf was heading directly toward a rocky slope which lay against the sky like the spiny back of some gigantic monster of the past.

His strategy had almost won the race. For a moment the wolf rested on the ridge, and I leaped out to shoot, but instantly he dropped behind the bowlders. Leaving me to intercept the animal, Charles swung behind the ridge only to run at full speed into a sandy pocket. The motor ceased to throb, and the race was ended.

These wolves are sneaking carrion-feeders and as such I detest them, but this one had "played the game." For twelve long miles he had kept doggedly at his work without a whimper or a cry of "kamerad." The brute had outgeneraled us completely, had won by strategy and magnificent endurance. Whatever he supposed the roaring car to be, instinct told him that safety lay among the rocks and he led us there as straight as an arrow's flight.

The animal seemed to take an almost human enjoyment in the way we had been tricked, for he stood on a hillside half a mile away watching our efforts to extricate the car. We were in a bad place, and it was evident that the only method of escape was to remove all the baggage which was tied to the running boards. Spreading our fur sleeping bags upon the sand, we pushed and lifted the automobile to firm ground after an hour of strenuous work. Hardly had we started back to the road, when Charles suddenly clapped both hands to his face yelling, "My Lord, I'm burning up. What is it? I'm all on fire."

Mrs. Coltman pulled his hands away, revealing his face covered with blotches and rising blisters. At the same moment Yvette and I felt a shower of liquid fire stinging our hands and necks. We leaped out of the car just as another blast swept back upon us. Then Charles shouted, "I know. It's the Delco plant," and dived toward the front mud guard. Sure enough, the cover had been displaced from one of the batteries, and little pools of sulphuric acid had formed on the leather casings. The wind was blowing half a gale, and each gust showered us with drops of colorless liquid which bit like tiny, living coals.

In less than ten seconds I had slashed the ropes and the batteries were lying on the ground, but the acid had already done its work most thoroughly. The duffle sacks containing all our field clothes had received a liberal dose, and during the summer Yvette was kept busy patching shirts and trousers. I never would have believed that a little acid could go so far. Even garments in the very center of the sacks would suddenly disintegrate when we put them on, and the Hutukhtu and his electric plant were "blessed" many times before we left Mongolia.

PLATE V