Eustace was the second son of Lieutenant-Colonel Aymer Maxwell of Monreith and Lady Mary Maxwell. He was the brother of Gavin Maxwell, a wartime SOE Instructor and post war author 'Ring of Bright Water'. Maxwell married Dorothy Vivien Belville 18 May 1940 (divorced 1949) and went on to have two children Diana Mary Maxwell 1942, and Michael Eustace George Maxwell 1943.
In 1949 Maxwell moved from Wincanton, Somerset and bought Morris Hall Farm, Norham-on-Tweed, Northumberland. He set about making it a noted pig breeding farm and famous throughout Britain before selling in Feb 1957. He moved to South London that spring and reported to The Berwick Advertiser that "I have not yet made definite plans as to the future but I am considering one or two business offers in the City".
| Unit or location | Role | Posted from | until |
|---|---|---|---|
| Highlands & Islands | Intelligence Officer | 27 Jul 1940 | 1941 |
Winchester College, Winchester, Hampshire
Royal Military College, Sandhurst, Berkshire
Promoted to Lieutenant 22 March 1939. On 27 July 1940 he drove to Scotland to set up Auxiliary Units. On 6 Jan 1942 he was promoted Temporary Major.
He was known to be a lover of fast cars and worked on developing car and bus wash machines. He died in Edindurgh.
The Last Ditch, David Lampe,
The Scotsman 20 May 1940, Berwick Advertiser 14 Feb 1957, The Tatler 29 May 1940