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
Prime Minister of Australia is always the case. The only case where a member of the Senate was appointed Prime Minister was John Gorton, who subsequently resigned his Senate position and was elected as a member of the House of Representatives. Despite the importance of the office of Prime Minister, the Constitution does not mention the office by name. The conventions of the Westminster system were thought to be sufficiently entrenched in Australia by the authors of the Constitution that it was deemed unnecessary to detail them. The formal title of the portfolio has always been simply "Prime Minister", except for the period of