As one might expect, the "Decadent" poets of the 1890s -- with their wistfulness, melancholy, and obsession with death -- found autumn to be congenial. I confess that I, too, am a pushover for the autumnal dreamland (without the death). Thus, although some might find it old-fashioned, quaint, and predictable, I am quite fond of the following poem by Arthur Symons, which has it all: "mist-enfolded lanes," "a few faint stars," "lingering twilight" (which, of course, "wanes"), and a "darkening vale" -- not to mention "lover with lover wandering."
The long September evening dies
In mist along the fields and lanes;
Only a few faint stars surprise
The lingering twilight as it wanes.
Night creeps across the darkening vale;
On the horizon tree by tree
Fades into shadowy skies as pale
As moonlight on a shadowy sea.
And, down the mist-enfolded lanes,
Grown pensive now with evening,
See, lingering as the twilight wanes,
Lover with lover wandering.
Arthur Symons, London Nights (1895). Symons indicates in a note that the poem was written on September 12, 1891.