And did those feet in ancient time" is a short poem by William Blake from the preface to his epic Milton: a Poem (1804). Today it is best known as the hymn "Jerusalem", with music written by C. Hubert H. Parry in 1916. The popularity of Parry's arrangement has resulted in many hundreds of recordings being made, too numerous to list, of both traditional choral performances and new interpretations by popular music artists.