I just stumbled across this — in May 1938 Weird Tales published an “acrostic sonnet” by H.P. Lovecraft:

Eternal brood the shadows on this ground,
Dreaming of centuries that have gone before;
Great elms rise solemnly by slab and mound,
Arch’d high above a hidden world of yore.
Round all the scene a light of memory plays,
And dead leaves whisper of departed days,
Longing for sights and sounds that are no more.

Lonely and sad, a spectre glides along
Aisles where of old his living footsteps fell;
No common glance discerns him, tho’ his song
Peals down thro’ time with a mysterious spell:
Only the few who sorcery’s secret know
Espy amidst these tombs the shade of Poe.

The lines’ initial letters spell out EDGAR ALLAN POE.