“Left the room!” said Martha. “Oh, Sister Helen, have they been here?”

“Yes, both of them, poor children. I went away to fetch some hot water. Betty was lying very quiet; she had not spoken for nearly an hour. I hoped she was dropping asleep. When I came back I saw a sight which would bring tears to any eyes. Her two little sisters had climbed on to the bed and were lying close to her, one on each side. They didn’t notice me at all; but as I came in I heard one of them say, ‘Don’t fret, Bettina; we are going now, at once, to find it.’ And then the other said, ‘And we won’t come back until we’ve got it.’ There came the ghost of a smile over my poor little patient’s face. She tried to speak, but was too weak. I went up to one of the little girls and took her arm, and whispered to her gently; and then they both got up at once, as meekly as mice, and said, ‘Betty, we won’t come back until we’ve found it.’ And poor little Betty smiled again. For some extraordinary reason their visit seemed to comfort her; for she sighed faintly, turned on her side, and dropped asleep, just as she is now. I must go back to her at once, Miss—Miss——”

“West,” replied Martha. “Martha West is my name.”

The nurse said nothing further, but returned to the sickroom. Martha went very quickly back to her own. She felt she had a task cut out for her. The twins had in all probability gone out. Their curious reticence had been the most painful part of poor Martha’s night-vigil. She had to try to comfort the little girls who would not confide one particle of their trouble to her. At intervals they had broken into violent fits of sobbing, but they had never spoken; they had not even mentioned Betty’s name. By and by, towards morning, they each allowed Martha to clasp one arm around them, and had dropped off into an uneasy slumber.

Now they were doubtless out of doors. But where? Martha was by no means acquainted with the haunts of the twins. She knew Sibyl Ray fairly well, and had always been kind to her; but up to the present the younger Vivian girls had not seemed to need any special kindness. They were hearty, merry children; they were popular in the school, and had made friends of their own. She wanted to seek for them now, but it never occurred to her for a single moment where they might possibly be discovered.

The grounds round Haddo Court were very extensive, and Martha did not leave a yard of these grounds unexplored, yet nowhere could she find the twins. At last she came back to the house, tired out and very miserable. She ran once more to her own room, wondering if they were now there. The room was quite empty. The housemaid had removed the breakfast-things and built up the fire. Martha had been told as a great secret that the Vivians possessed an attic, where they kept their pets. She found the attic, but it was empty. Even Dickie had forsaken it, and the different caterpillars were all buried in their chrysalis state. Martha quickly left the Vivians’ attic. She wandered restlessly and miserably through the lower school, and visited the room where she had slept, or tried to sleep, the night before. Nowhere could she find them.

Meanwhile Sylvia and Hester had done a very bold deed. They were reckless of school rules at a moment like the present. Their one and only desire was to save Betty at any cost. They knew quite well that Betty had hidden the packet, but where they could not tell. Betty had said to them in her confident young voice, “The less you know the better;” and they had trusted her, as they always would trust her as long as they lived, for Betty, to them, meant all that was noble and great and magnificent in the world.

It flashed now, however, through Sylvia’s little brain that perhaps Betty had taken the lost treasure to Mrs. Miles to keep. She whispered her thought to Hester, who seized it with sudden rapture.

“We can, at least, confide in Mrs. Miles,” said Hetty; “and we can tell the dogs. Perhaps the dogs could scent it out; dogs are such wonders.”