"That makes no difference. Tell him that I have something particular to
say to him."

The orderly went into the cabin, and, in a few moments, returned, and
said:

"The captain says walk in, sir."

"Captain," said Frank, after he had closed the door carefully behind him,
"have you lost your signal-book?"

"No, I guess not;" answered the captain, in a tone of surprise. "What
makes you ask?"

"I heard, a few moments ago, that it had been stolen from you."

"I have not had occasion to use it for two or three weeks," answered the
captain, getting out of bed; "but I know exactly where I put it;" and he
opened a drawer in the sideboard, and commenced to overhaul the contents.

"Set me down for a landlubber," he exclaimed, at length, "if it hasn't
been stolen. It isn't here, at any rate."

Frank then related the conversation which had taken place between himself
and the negro, and the captain continued:

"Well, I always thought those folks had some object in view, or they would
not have been so friendly. I can't reproach myself for neglecting my duty,
for I watched them pretty closely."

"I wonder how that girl knew that the signal-book was in that drawer,"
said Frank.

"I suppose she must have seen me put it in there," said the captain. "Now,
the question is, now to go to work to recover it. It will do no good to
search the house."

"If you will leave the matter in my hands, sir," said Frank, "I will agree
to recover the signal-book, and capture that mail-bag which they intend to
send across the river in a few days."

"Well," said the captain, "it was you who first knew that the signal-book
was gone, and I believe you ought to have the honor of sifting the matter
to the bottom. Find out all you can, and call on me for any assistance you
may need."

Frank immediately returned to the plantation, and started toward the
quarters, in quest of the negro who had given him the information, whom he
found chopping wood in front of one of the cabins.

"See here, uncle," he exclaimed, "I want you to keep me posted on all that
goes on here on the plantation; and tell your daughter to find out when
that rebel lieutenant is coming here again, and when they intend to send
that mail across the river."

"I will do my best, young master," answered the negro. "But you won't tell
any one what I have said to you? I shall be killed, sure, if you do"

"No, uncle, I shan't betray you; so don't be afraid," said Frank; and,
after