Sir Roderick Impey Murchison (1792-1871). Scottish geologiSt Portrait, from a painting by Pickersgill R.A. Engraved by Joseph Brown. Image taken from Life of Sir R. I. Murchison with notices of his scientific contemporaries and a sketch of the rise and growth of palaeozoic geology in Britain.. Originally published in London, 1875. Author Sir Archibald Geikie, Illustrated by Joseph Brown.