Perhaps her best-known song was "You Were on My Mind", which was originally recorded by Ian & Sylvia in 1964. The song became a massive hit single in the mid-1960s for the San Francisco-based folk-rock band We Five and also for the British pop singer Crispian St. Peters. It has become a rock and roll standard which has been covered numerous times.
She married Ian Tyson in 1964; they divorced in 1975. During their marriage, they had one child, Clay (Clayton Dawson) Tyson. Sylvia has contributed offstage to the Canadian music scene as a board member of FACTOR and the Juno Awards. She also established an independent record label, Salt Records, in the early 1980s.
^"They're partners in life as well as in music, which must have its difficult moments like the prospect of having to sing with someone you were maybe not speaking to. But they certainly have made that work, what with that thing rolling around on the rug, young Clayton Dawson, herein and hereafter referred to as 'Mr. Spoons.'" From the jacket notes (by John Court) to Ian and Sylvia's LP "Lovin' Sound", MGM 4388, 1967. Quoted in Mudcat Forum by Dale Rose, 1999-04-16; accessed 2011-05-08.