At length, when we had made about seven miles, as far as Billerica, we moored our boat on the west side of a little rising ground which in the spring forms an island in the river.  Here we found huckleberries still hanging upon the bushes, where they seemed to have slowly ripened for our especial use.  Bread and sugar, and cocoa boiled in river water, made our repast, and as we had drank in the fluvial prospect all day, so now we took a draft of the water with our evening meal to propitiate the river gods, and whet our vision for the sights it was to behold.  The sun was setting on the one hand, while our eminence was contributing its shadow to the night, on the other.  It seemed insensibly to grow lighter as the night shut in, and a distant and solitary farm-house was revealed, which before lurked in the shadows of the noon.  There was no other house in sight, nor any cultivated field.  To the right and left, as far as the horizon, were straggling pine woods with their plumes against the sky, and across the river were rugged hills, covered with shrub oaks, tangled with grape-vines and ivy, with here and there a gray rock jutting out from the maze.  The sides of these cliffs, though a quarter of a mile distant, were almost heard to rustle while we looked at them, it was such a leafy wilderness; a place for fauns and satyrs, and where bats hung all day to the rocks, and at evening flitted over the water, and fire-flies husbanded their light under the grass and leaves against the night.  When we had pitched our tent on the hillside, a few rods from the shore, we sat looking through its triangular door in the twilight at our lonely mast on the shore, just seen above the alders, and hardly yet come to a stand-still from the swaying of the stream; the first encroachment of commerce on this land.  There was our port, our Ostia.  That straight geometrical line against the water and the sky stood for the last refinements of civilized life, and what of sublimity there is in history was there symbolized.

For the most part, there was no recognition of human life in the night, no human breathing was heard, only the breathing of the wind.  As we sat up, kept awake by the novelty of our situation, we heard at intervals foxes stepping about over the dead leaves, and brushing the dewy grass close to our tent, and once a musquash fumbling among the potatoes and melons in our boat, but when we hastened to the shore we could detect only a ripple in the water ruffling the disk of a star.  At intervals we were serenaded by the song of a dreaming sparrow or the throttled cry of an owl, but after each sound which near at hand broke the stillness of the night, each crackling of the twigs, or rustling among the leaves, there was a sudden pause, and deeper and more conscious silence, as if the intruder were aware that no life was rightfully abroad at that hour.  There was a fire in Lowell, as we judged, this night, and we saw the horizon blazing, and heard the distant alarm-bells,