That track is a gritty early hit by Them, fronted by a young Van Morrison. Their version helped bring a raw American blues song into the British Invasion era. Key points: Originally written/recorded by: Big Joe Williams (1935) — a Delta blues standard Them’s version: Recorded in 1964, released as a single in the UK Style: Blues-rock with a rough, driving feel (harmonica chugging rhythm) Why it matters: It showcased Van Morrison’s powerful, soulful vocal style and influenced later blues-rock band