From the late 1970s, his work marked allusions to earlier painters, such as Francisco Goya, Édouard Manet and Henri Matisse, either through the quoting of a pictorial motif, or the use of a particular technique [citation needed].
After spending some time in Australia, Walker got a position at the Victoria College of the Arts in Melbourne.
[4] He produced the Oceania series around this time which incorporates elements of native Oceanic art.
[8] In September 2010, Walker and five other British artists including Howard Hodgkin, John Hoyland, Ian Stephenson, Patrick Caulfield and R.B.
[9][10] Walker has a 2008 Landscape Painting on display at the National Gallery in Washington, D.C. in the Modern Section [citation needed].