Bridget Riley b.1931Fragment 7, 1965screenprint on plexiglas20 by 39 inchessigned, edition no. 15/75ExhibitedArts Council, Bridget Riley Silkscreen Prints 1965- 1978, 1980, cat no.6 Arts Council Touring Exhibition, Bridget Riley Complete Prints 1962 - 2001, 2002-3, cat no.5g illus b/w