Grenfell three times threw the dogs off the Pan. Each time they struggled back upon it: and their master could not blame them.

"This is really the end!" Grenfell told himself. "We never shall get out of this!"

Just as a boy sometimes comes up to the scratch where a man has failed, a small dog may play the hero when a big one quits. That was the case here. The smallest dog of the lot, "Jack," came to the rescue. He was so small that he was not taken very seriously for his hauling power—but when it came to hunting, he was there with all four paws, and he was used as retriever when Dr. Grenfell went out with a gun. Here was a chance for him to show the stuff that was in his black, rough hide.

"Jack!" said the Doctor. "Hist! Hist!" And he pointed to the other pan, and threw a piece of ice in that direction.

"Jack" understood and instantly obeyed. In little more time than it takes to tell of it, his furry paws had taken his small body through and over the rotten mush. Since he was the lightest of the lot, he scarcely sank below the surface as he went. "His frame was little but his soul was large."

When he got there he turned about, wagging his tail as a flag-signal, his tongue lolling out, his whole attitude seeming to say, "Well, aren't you pleased with me?"

"Lie down!" shouted Grenfell, and the dog at once obeyed—"a little black fuzz ball on the white setting."

That was an object lesson to "Brin" and the other dog. The next time he threw them off they made directly for the other pan. It was a hard fight to get there, but they must have said to themselves: "What dog has done, dog can do. If that little fellow can turn the trick, so can we." So they plashed and floundered through, their heads barely above the waves, and the salt spray in their eyes, till they had carried the lines across. The traces had been knotted securely under their bellies, so they could not come off when the Doctor pulled with the weight of his body against the lines.

He took as much of a run as he could get in the few feet from side to side of the pan, and dived headlong into the "slob." It was a long, hard pull, but the lines held, and the dogs too, so that presently he found himself scrambling up beside them on the other pan where they were waiting with little "Jack."

To his crushing disappointment, Dr. Grenfell found that the place where he now clung was if anything worse than the spot he had left. By this time all the other dogs but one poor fellow had made the distance, and were beside him, their eyes asking the piteous questions their tongues could not utter.