== Life and background ==Mary Ann was born to locksmith Edward Walker and his wife Caroline on 26 August 1845, in Dean Street in London.
(1973)* Quo (1974)* On the Level (1975)* Blue for You (1976)* Rockin' All Over the World (1977)* If You Can't Stand the Heat (1978)* Whatever You Want (1979)* Just Supposin' (1980)* Never Too Late (1981)* 1982 (1982)* Back to Back (1983)* In The Army Now (1986)* Ain't Complaining (1988)* Perfect Remedy (1989)* Rock 'Til You Drop (1991)* Thirsty Work (1994)* Don't Stop (1996)* Under The Influence (1999)* Famous in the Last Century (2000)* Heavy Traffic (2002)* Riffs (2003)* The Party Ain't Over Yet (2005)* In Search of the Fourth Chord (2007)* Quid Pro Quo (2011)* Bula Quo!