The Hunting of the Snark
The poem was written from 1874 to 1876. The setting, some creatures, and eight portmanteau words are taken from Carroll's earlier poem Jabberwocky in his children's novel Through the Looking-Glass (1871). The eight words are:  bandersnatch, beamish, frumious, galumphing, jubjub, mimsiest (which previously appeared as mimsy in "Jabberwocky"), outgrabe and uffish.