Bolckow:
Sir Clements Robert Markham K.C.B., F.R.S., (1830-1916) - Secretary of the Royal Geographical Society by Frederick William Pomeroy R.A. - erected by the Government of Peru on the front of the Society's Headquarters Building in Kensington Gore, London SW7
Bolckow:
British Polar Explorers - Sir James Clarke Ross - First Day of Issue - 16th February 1972 Postmarked York.