I failed utterly of understanding his meaning; but since he was not disposed to make it plain I held my peace, and we two went out into the night, not by way of the streets, but through the gardens, and along alleys, where we might pass without coming in contact with the Britishers, or with the patrol. Before we were well started on our devious way Hiram came to a full halt, as he caught me by the arm and pointed toward the sky. For the instant I could not make out the meaning of his gesture, and then it was I saw down in the south an inky mass of clouds which seemed to be coming swiftly against the wind, and my heart leaped into my mouth, for verily it seemed as if this would be the cloudy night we desired. If that dark mass proved what it promised, there would be such a downpour that the Britishers must keep themselves well within cover. I was trembling with excitement as we went on, believing the time for our dangerous venture to be near at hand, and I prayed most fervently that the tempest which was seemingly gathering upon us, would burst before midnight. Then came a cold chill to my heart, as I realized that I had not had time to gather the skiffs as Hiram advised, because of having been occupied with showing him the best hiding places. I was nigh to tears as I said to myself that however advantageous the night might be for our purpose, we could not profit by it because of lacking means of leaving the town by water--as for thinking of going across the Neck, if by any fortunate chance we succeeded in releasing Archie, that would be out of the question so closely was the place guarded. "It's a pity we hadn't spent a little time getting the skiffs into convenient places, rather than looking for a chance to hide," Hiram said as if to himself when we came up through Master Hayes's back yard to Middle street, listening there for some token of the watch, for it would be necessary to continue on as far as Hanover street by the highway where there was no opportunity of concealment. "Then you believe this night would serve our purpose?" I said in what you might call a tearful tone, for I was near to crying with vexation because of having wasted a goodly part of the afternoon loitering about the town when I might have had everything in readiness for a hasty flight. "Ay, lad, yonder clouds mean plenty of rain and wind, and I am much mistaken if within the hour the night be not so black and stormy that you might pass in the same street a squad of Britishers, and they be none the wiser." "And it may be a month before such an opportunity comes again," I said mournfully. "We shall most like have storms in plenty; but never one at exactly the right moment, as this promises."