Robert Arthur Talbot Gascoyne-Cecil, Third Marquess of Salisbury (1830-1903) and British Prime Minister. Reportedly suggested that Ripper suspect Prince Albert Victor was killed from an overdose of morphine administered to him under Cecil’s direction. ALS signed “Salisbury,” one page, 4.5 x 7.25, November 17, 1871. Letter to Sir Louis. In part: “Many thanks. My staff is full & however desirous I might be of increasing it...” Intersecting folds, one through a single letter of signature, pencil notation to top right, and light creasing and marginal binding holes along hinge, otherwise fine condition. RRAuction COA.