Thomas Stevenson, British toxicologist, 1899.

Chromolithograph by Vincent Brooks Day and Son Ltd of a caricature by A G Witherby, better known as Wag, from 'Vanity Fair' magazine. Dr Thomas Stevenson (1838-1908) was a pioneer of toxicology; the study, isolation and identification of drugs and chemicals from tisues and body fluids. Dimensions: 400mm x 270mm.