"Then, again, good-by."

She waved her hand, smiling, and was lost in the crowd.

"Come on, Lester," said Mr. Royce's voice. "There's no use standing staring here. We've got our own journey to look after," and he started back along the platform.

Then, suddenly, I remembered Martigny.

"I'll be back in a minute," I called, and ran up the gang-plank. "Has M. Martigny left the ship yet?" I inquired of the first steward I met.

"Martigny?" he repeated. "Martigny? Let me see."

"The sick gentleman in 375," I prompted.

"Oh, yes," he said. "I do not know, monsieur."

"Well, no matter. I'll find out myself."

I mounted to the upper deck, and knocked at the door of 375. There was no response. After a moment, I tried the door, but it was locked. The window, however, was partly open, and, shading my eyes with my hands, I peered inside. The stateroom was empty.