Adventures in Unnatural History and Medieval Metres, being the Freaks of Fisiologus
From Tolkien Gateway
Adventures in Unnatural History and Medieval Metres, being the Freaks of Fisiologus is a poem written by J.R.R. Tolkien and published in 1927 within The Stapeldon Magazine Vol. 7 No. 40 on pages 123-127. Tolkien used the pen name Fisiologus. The poem is reprinted in a revised form as Fastitocalon within The Adventures of Tom Bombadil