Joe Tilson (b.1928) Jan Palach (Vancouver Arts Gallery 24) screenprint in colours with collage, 1970, on wove paper, signed and dated in pencil, inscribed 'A/P', with full margins, in very good condition, framed S. 1005 x 600mm.; and Let a thousand parks bloom (V.A.G. 28), screenprint in colours, 1971, signed and dated in pencil, inscribed 'Artist's Proof' (2)