Sandars, a former officer in the British Army, went to the Solomon Islands in 1928 to join the armed constabulary. He was one of the most important District Officer and District Commissioners on Malaita throughout the 1930s until 1947. He died in NSW in March 1975.

The papers comprise:

1. Autobiography covering the years 1928-43
2. A diary kept from 23 November 1942 - 7 April 1943
3. Autobiography, 1896-1923