The walls of my study are of ever-changing verdure, and its roof and floor of ever-varying blue. I never enter it without a new heaven above and new thoughts below. The lake has no lofty shores and no level ones, but a series of undulating hills, fringed with woods from end to end. The profaning axe may sometimes come near the margin, and one may hear the whetting of the scythe; but no cultivated land abuts upon the main lake, though beyond the narrow woods there are here and there glimpses of rye-fields that wave like rolling mist. Graceful islands rise from the quiet waters,--Grape Island, Grass Island, Sharp Pine Island, and the rest, baptized with simple names by departed generations of farmers,--all wooded and bushy and trailing with festoonery of vines. Here and there the banks are indented, and one may pass beneath drooping chestnut-leaves and among alder-branches into some secret sanctuary of stillness. The emerald edges of these silent tarns are starred with dandelions which have strayed here, one scarce knows how, from their foreign home; the buck-bean perchance grows in the water, or the Rhodora fixes here one of its shy camping-places, or there are whole skies of lupine on the sloping banks;--the catbird builds its nest beside us, the yellow-bird above, the wood-thrush sings late and the whippoorwill later, and sometimes the scarlet tanager and his golden-haired bride send a gleam of the tropics through these leafy aisles. Sometimes I rest in a yet more secluded place amid the waters, where a little wooded island holds a small lagoon in the centre, just wide enough for the wherry to turn round. The entrance lies between two hornbeam trees, which stand close to the brink, spreading over it their thorn-like branches and their shining leaves. Within there is perfect shelter; the island forms a high circular bank, like a coral reef, and shuts out the wind and the passing boats; the surface is paved with leaves of lily and pond-weed, and the boughs above are full of song. No matter what white caps may crest the blue waters of the pond, which here widens out to its broadest reach, there is always quiet here. A few oar-strokes distant lies a dam or water-break, where the whole lake is held under control by certain distant mills, towards which a sluggish stream goes winding on through miles of water-lilies. The old gray timbers of the dam are the natural resort of every boy or boatman within their reach; some come in pursuit of pickerel, some of turtles, some of bull-frogs, some of lilies, some of bathing. It is a good place for the last desideratum, and it is well to leave here the boat tethered to the vines which overhang the cove, and perform a sacred and Oriental ablution beneath the sunny afternoon.