"Government," the Eskimo replied. "Schoolhouse one time. Not now. Not many children. I—I teach 'em a little, mine. Teach 'em in native house, mine."

So there the mystery was solved. They were in a schoolhouse built by the United States Government, but which was not now being used. The natives, always very superstitious, having seen their faces through the window, and not believing it possible that any white persons could come to the island at such a time, had, at the suggestion of the old witch-doctor, resolved to burn the house in the hopes of driving the spirits away. When the lame boy had limped into their midst, and had told how his wound had been dressed by these white women, and how he had seen them eat fish, which no spirit can do, according to the superstition of the Eskimo, they had been quite ready to put out the fire and welcome the strangers, all the more so since the girls had been kind to one in distress.

Phi's experience in the village of the island upon which he had been cast was more happy than he could have dreamed of. It turned out that the native who had attacked him was the only drunken person on the island. That it was an island, the Big Diomede, he was immediately informed by a young native who had learned English on a whaler.

So it turned out that the two parties, Lucile and Marian and Phi and Rover, had been carried about on the ice-floe for three days at last to be landed on twin islands.

Phi's first thought was for the safety of his former traveling companions. When he learned that nothing had been seen of them on the Big Diomede, without pausing to rest he pushed on across the now solidly frozen mass of ice which silenced the two miles of ocean which, in summer, sweeps between the two islands.

It was night when he arrived, the night of the strange witch-doctor's seance. This had all come to an end. The schoolhouse was dark—the girls were asleep. From a prowling native he learned that the girls were there and safe, then he turned in for a long sleep.

Next day, much to the surprise and delight of the girls, he walked in upon them as they were at breakfast.

When the story of all their strange adventures had been told Phi drew from his pocket a much soiled blue envelope.

Phi first told how he had finally come into possession of the letter, then he went on:

"I—I guess I may as well tell you about it. It's really no great mystery, no great story of the discovery of gold. Just the locating of a bit of whalebone.