Dick obeyed without curiosity, then turned again and gained his
seat. The instructor, in the meantime, had called upon Mr. Pike.
While Pike was reciting, haltingly, Captain Abbott turned over
the slip of paper on his desk, glancing at it with "one of his
pairs of eyes."

Anyone who had been looking at the instructor at that moment would
have noted a slight start and a brief change of color in the captain's
face. But he said nothing until all of the cadets had recited
and had been marked.

"Mr. Prescott!" the instructor then called Dick rose, standing
by his seat.

"Mr. Prescott, did you work out your problem for today unaided?"

"I had a little aid, last night, sir, from Mr. Anstey."

"But you had no aid in the section room today?"

"No, sir," replied Dick, feeling much puzzled.

"You understand my question, Mr. Prescott?"

"I think so, sir."

"In putting down your demonstration on the blackboard today you had
no aid whatever?"