But the stately elm played me a trick: it slyly and at long intervals let great drops of water down upon me, now with a sharp smack upon my rubber coat; then with a heavy thud upon the seat in the bow or stern of my boat; then plump into my upturned ear, or upon my uncovered arm, or with a ring into my tin cup, or with a splash into my coffee-pail that stood at my side full of water from a spring I had just passed. After two hours' trial I found dropping off to sleep, under such circumstances, was out of the question; so I sprang up, in no very amiable mood toward my host, and drew my boat clean from under the elm. I had refreshing slumber thenceforth, and the birds were astir in the morning long before I was. There is one way, at least, in which the denuding the country of its forests has lessened the rainfall: in certain conditions of the atmosphere every tree is a great condenser of moisture, as I had just observed in the case of the old elm; little showers are generated in their branches, and in the aggregate the amount of water precipitated in this way is considerable. Of a foggy summer morning one may see little puddles of water standing on the stones beneath maple-trees, along the street; and in winter, when there is a sudden change from cold to warm, with fog, the water fairly runs down the trunks of the trees, and streams from their naked branches. The temperature of the tree is so much below that of the atmosphere in such cases that the condensation is very rapid. In lieu of these arboreal rains we have the dew upon the grass, but it is doubtful if the grass ever drips as does a tree. The birds, I say, were astir in the morning before I was, and some of them were more wakeful through the night, unless they sing in their dreams. At this season one may hear at intervals numerous bird voices during the night. The whip-poor-will was piping when I lay down, and I still heard one when I woke up after midnight. I heard the song sparrow and the kingbird also, like watchers calling the hour, and several times I heard the cuckoo. Indeed, I am convinced that our cuckoo is to a considerable extent a night bird, and that he moves about freely from tree to tree. His peculiar guttural note, now here, now there, may be heard almost any summer night, in any part of the country, and occasionally his better known cuckoo call. He is a great recluse by day, but seems to wander abroad freely by night.