The latter gentleman, busy and important, dropped much of his official way when he found whom he was accosting.  “This is quite unexpected, sir,” he began, removing his cap and bowing.

“Captain Rogers,” began the other, “you have been advised to some extent of my plans by telegram from Washington.”

The captain hesitated.  “Is this with the lady’s consent?  I must consider the question of damages.”

“There will be no damages.  Your owners will be quite safe, and so will you.”

“Are there any charges of any kind against——?”

“That is not for you to ask.  She is under my care, and must not disembark until I say the word.  You will kindly give her a place at my table.  There must be no idle curiosity to annoy her.  But tell me, when shall we reach the mouth of the river?  Is it not possible to save some time by avoiding some of the smaller stops?”

“But our freight, our passengers—­” The captain passed a hand across his brow, much perplexed.  The other showed a sudden firmness.

“My errand demands secrecy and speed alike.  There must be no communication between this boat and the shore, so far as this young lady is concerned.  Meantime, if all is ready, it would please me mightily if we could start.”

The captain pulled a bell rope.  “Tell the mate to cast off,” he said, to the man who answered.  An instant later the hoarse boom of the boat’s whistles roared out their warning.  There came a crush of late-comers at the gangway.  Shouts arose; deck hands scrambled with the last packages of freight; but presently the staging was shipped and all the lines cast free.  Churning the stained waters into foam with her great paddles, the Mount Vernon swung slowly out into the narrow stream.

[Illustration:  The Captain pulled a bell rope.]

“Now, Captain Rogers,” went on Captain Carlisle, tersely, “tell, me who’s aboard;” and presently he began to ponder the names which, in loose fashion, the clerk assembled from his memory and his personal acquaintance.

“Hm, Hm!” commented the listener, “very few whom I know.  Judge Clayton from the other side, below Cairo.  State Senator Jones, from Belmont—­”

“You know Mr. Jones?  Old ‘Decline and Fall’ Jones?  He never reads any book excepting Gibbon’s Decline and Fall of the Roman Empire.  Always declines a drink when offered, but he’s sure to fall a moment later!” Thus the smiling clerk.

“Well, I may see Mr. Jones, possibly Judge Clayton.  There’s no one else.”  He seemed not dissatisfied.

Alas! for human calculations and for human hopes!  Even as he left the captain’s room to ascend the stair, he met face to face the very man whose presence he least desired.

“Dunwody!” he exclaimed.

The gentleman thus addressed extended a hand.  “I see you are safe aboard.  Myself, too, I am very glad.”

“I thought you said you were going—­”