they came on board—not appearing at supper—I'm going to keep my eyes open."
"All right, go as far as you like and I'm with you. Just now you may pass me the powdered sugar. I want some on this pie."
Tom laughed at Ned's matter-of-fact indifference, but when the young inventor turned in to his berth that night he could not stop thinking of the empty seats—the two mysterious passengers—and the two Fogers. They got all jumbled in his head and made his sleep restless.
Morning saw the Maderia well out to sea, and, as there was quite a swell on, the vessel rolled and pitched to an uncomfortable degree. This did not bother Tom and Ned, who were used to sudden changes of equilibrium from their voyages in the air. Nor did Mr. Damon suffer. In fact he was feeling fine and went about on deck like an old salt, blessing so many new things that he had many of the passengers amused.
Poor Eradicate did suffer though. He was very seasick, and kept to his berth most of the time, while some of his new friends did what they could for him.
Tom had in mind a plan whereby he might solve the identity of the mysterious passengers. He was going to do it by a process of elimination—that is he would carefully note all on board
