British Prime Minister: - Robert Gascoyne-Cecil, 3rd Marquess of Salisbury (1830-1903, British Prime Minister 1885-86, 1886-92 and 1895-1902), signature on 2-page hand-written letter on '10 Downing Street' letterhead, dated Jan. 14.1901, written during the Boer War, regarding invaliding unft soldiers from regiments