Evans of the Broke: A Biography of Admiral Lord Montevans.

Evans was second-in-command of Scott's ill fated expedition and a destroyer commander in WWI. After he was successively Commander-in-Chief, Australia, Commander-in-Chief, South Africa, Commander-in-Chief, the Nore. During WWII was responsible for Civil Defence in London. Published OUP in 1963.

Scott of the Antarctic

A very non-critical book about Scott but does contain an extraordinary about of detail. Published by Cassell in 1966.