I have said that Walden has no visible inlet nor outlet, but it is on the one hand distantly and indirectly related to Flint’s Pond, which is more elevated, by a chain of small ponds coming from that quarter, and on the other directly and manifestly to Concord River, which is lower, by a similar chain of ponds through which in some other geological period it may have flowed, and by a little digging, which God forbid, it can be made to flow thither again. If by living thus reserved and austere, like a hermit in the woods, so long, it has acquired such wonderful purity, who would not regret that the comparatively impure waters of Flint’s Pond should be mingled with it, or itself should ever go to waste its sweetness in the ocean wave?