Robert Gascoyne-Cecil, 3rd Marquess of Salisbury prime minister of his lifetime. Attlee immediately replied: "Salisbury". The 6th Marquess of Salisbury commissioned Andrew Roberts to write Salisbury's authorised biography, which was published in 1999. After the Bering Sea Arbitration, Canadian Prime Minister Sir John Sparrow David Thompson said of Lord Salisbury's acceptance of the Arbitration Treaty that it was "one of the worst acts of what I regard as a very stupid and worthless life". The British phrase 'Bob's your uncle' is thought to have derived from Robert Cecil's appointment of his nephew, Arthur Balfour, as Chief Secretary for Ireland. Fort Salisbury (now Harare) was named in
Marquess of Salisbury to 1902 and also served four times as Foreign Secretary. His time as Prime Minister coincided with a great expansion of the British Empire. Lord Salisbury is also remembered as an adherent of the policy of "splendid isolation", the desire to keep Great Britain out of European affairs and alliances. He was also the last British Prime Minister to serve from the Lords Salisbury was offered a dukedom by Queen Victoria in 1886 and 1892, but declined both offers, citing the prohibitive cost of the lifestyle dukes were expected to maintain. He was succeeded by his eldest son, the fourth