The hamadryades have gone, like the golden fancies of which they were engendered—morning dreams of a young world scarce awake, but full of freshness and beauty. Yet often will the thought, or rather the fancy, come across me, that this wailing but most musical noise—heard in the dim evening, when every tree has a separate sound like a separate instrument, and every leaf a differing tone like the differing notes—is the piteous lament of some nymph pent within the gray and mossy trunk whence she may never more emerge in visible loveliness.
Source: wiktionary