Just a few years after The Waste Land appeared — a poem whose difficulty critics compared to some “pompous cross-word puzzle” — Edward Powys Mathers (alias: Torquemada) pioneered the cryptic: a puzzle form that, like modernist poetry, unwove language and rewove it anew. Roddy Howland Jackson reveals the pleasures and imaginative creatures lurking in Torquemada's lively grids.