Conversation so far:
How did the Australian Mining Corp with Edgeworth David start?
Edgeworth David wrote a proposal to Senator George Pearce, the Australian Defence Minister, suggesting that the government raise a military force to undertake mining and tunnelling.
What year did this happen when Edgeworth David wrote a proposal to Senator George Pearce, the Australian Defence Minister, suggesting that the government raise a military force to undertake mining and tunnelling?
In August 1915, Edgeworth David wrote a proposal to Senator George Pearce, the Australian Defence Minister, suggesting that the government raise a military force to undertake mining and tunnelling.
Was this establishment of an Australian Mining Corps a military endeavor?
The Australian Mining Corps was a specialist military mining unit of the Royal Australian Engineers during World War I.
Do you know how old Edgeworth David was when the establishment of the Australian Mining Corps happened?
Edgeworth David used his advocacy and organisational abilities to set up the Australian Mining Corps. On 25 October 1915 he was appointed as a major, at the age of 57.
So Edgeworth David was in control of it. Did Edgeworth David win any honors or mentions for the work of the Australian Mining Corps?
In January 1918, Edgeworth David was awarded the Distinguished Service Order and in November he was promoted to lieutenant colonel.

Question: When did he leave this position?
Self-contained rewrite: When did Edgeworth David leave this position overseeing the Australian Mining Corps?