assistants'? That's us."

"Very likely. But who is the man in with Professor Henderson,
and what is the wonderful journey he is talking about?"

"Dat gen'man in wid de perfesser am also a perfessor." Explained
Washington in a whisper. "He's Perfesser Santell Roumann. Now I
'spects I'd better saggasiate mahself inter proximity t' de
culinary reservation."

"You mean you've got to go to the kitchen?" asked Jack with a
smile.

"Dat's what I approximated to yo'," replied the colored man.

"I wonder if we'd better go in now, or wait until Professor
Henderson is through talking to Mr. Roumann?" asked Mark.

"Yo' am to go right in," remarked Washington. "Dem's de orders I
got when I went t' de statione t' meet yo'."

"All right," assented Jack. "Come on, Mark. We'll find out
what's wanted of us."

The two boys entered the library, whence the voices of Professor
Henderson and Mr. Roumann could still be heard in earnest
discussion. Mr. Henderson looked up as his proteges advanced to
the middle of the apartment.

"Jack! Mark!" he exclaimed. "I am very glad you came so