MB. WILLIAM R. S. LADELL, whose sudden death in Jamaica on November 6 has just been reported, was born in 1887 and educated at the Merchant Taylors School and Finsbury Technical College. Before completing his degree, he went abroad and started work on agricultural science in the tropics, which was to occupy the greater portion of his life. After three years in South Africa with the Department of Agriculture, part of which was at the Cedara Experimental Station, he accepted in 1912 a position with a commercial company in Malaya, where he carried out many field and laboratory experiments on rubber cultivation. During the War of 1914–18 he served at first in the Far East and later in Great Britain and reached the rank of major in the Royal Army Ordnance Corps.