It was only an accident which gave me a clue to the real program. Mapes sent me back into the vacant space just forward of the paddle-wheel, seeking a lost cant-hook, and, as I turned about to return the missing tool in my hand, I paused a moment to glance curiously out through a slit in the boat's planking, attracted by the sound of a loud voice uttering a command. I was facing the shore, and a body of men, ununiformed, slouching along with small regard to order, but each bearing a rifle across his shoulder, were just tipping the ridge and plowing their way down through the slippery clay in the direction of the forward gangway. They were noisy, garrulous, profane, their mingled voices drowning the shouts of their officers, yet advanced steadily--the troops destined for Rock River were filing aboard. I saw the column clearly enough, all the soldier in me revolting to such criminal lack of discipline, and the thought of hurling such untrained men as these into Indian battle. Yet, although I saw, not for an instant did my gaze linger on their disordered ranks. The sight which held me motionless was rather that of a long, broad plank, protected on either side by a rope rail, stretching from the slope of the second deck across the narrow gulf of water, until it rested its other end firmly against the bank. The meaning of this was sufficiently apparent. For some reason of his own, Kirby had evidently chosen this means of attaining the shore, and through personal friendship, Corcoran had consented to aid his purpose. The reason, plainly enough, was that by use of this stern gangway the landing party would be enabled to attain the bank without the necessity of pushing their way through the crowd of idle loungers forward. And the passage had just been accomplished, for, as my eyes focussed the scene, they recognized the spare figure of the deputy disappearing over the crest--a vague glimpse, but sufficient. At the same instant hands above began to draw in the plank. There was but one thing for me to do, one action to take--follow them. Dropping the cant-hook, I turned aft and crept forth through a small opening onto the wooden frame which supported the motionless paddlewheel, choosing for the scene of operations the river side, where the boat effectively concealed my movements from any prying eyes ashore. Everyone aboard would be clustered forward, curiously watchful of that line of soldiers filing across the gangplank and seeking quarters upon deck. The only danger of observation lay in some straggler along the near-by bank. I lowered myself the full length of my arms, dangling there an instant by clinging to the framework; then loosened my grip and dropped silently into the rushing waters beneath. CHAPTER XXII MY FRIEND, THE DEPUTY SHERIFF