I never heard of that poem until now. It definitely has a macabre "Mother Goose" feel to it which is very cool, which is appropriate for a Canadian ghost story, eh?
This reminds me of one little thing in BG3 that I found amusing ... the name of the raven summoned with the Find Familiar spell is "Quothe". Quothe the raven. I suppose this could be a connection to a world famous poem, but if any Larian writer has ever once posted here, they post here nevermore.
Quoth the raven is also a character in the wonderful Discworld novels and Terry Pratchett spelled the name correctly which is more than can be said for Larian.