Arguably the pre-eminent British folk-rock singer/songwriter of her time, Sandy Denny was a highly influential solo performer, as well as an integral force behind the work of pioneering groups like the Strawbs, Fairport Convention, and Fotheringay. The haunting, spectral presence of Denny's powerful and penetrating alto voice seemed to bring the mythology of English moors and folktales to life in contemporary, 20th century settings. Her landmark 1967 song "Who Knows Where the Time Goes" is considered a classic, having been recorded by her with Fairport Convention on 1969's Unhalfbricking and also made famous as a cover by Judy Collins. Prior to her tragic death from a fall in 1978 at age 31, Denny guested on Led Zeppelin's 1971 song "The Battle of Evermore" and released a handful solo albums in the '70s, including The North Star Grassman and the Ravens, Sandy, Like an Old Fashioned Waltz, and Rendezvous.