His earlier work at Greenwich and his two great star catalogues - the Cape Catalogue for 1880 and the Radclife r 'Catalogue for 1890.
See Proc. Roy. Society, lxii. 10; Month. Not. Roy. Ast. Soc. lviii. 143; The Times, 10th of May 1897; Observatory, xx. 234; Astr. Nach. No. 3426; Roy. Soc. Cat. Scient. Papers. (A. M. C.)