Ernest Le Gay Brereton (10 April 1869 – 4 August 1932) was an Australian mining engineer and lecturer at the University of Sydney.
[1] Brereton was educated at Sydney Grammar School and Christ's College, Christchurch, New Zealand, and after working at the goldfields of New South Wales studied engineering and metallurgy part-time at the University of Sydney.
for his research into the formation of gold deposits in New South Wales was promoted to lecturer, and held that post for 24 years.
He died at his home, Eastern Road, Turramurra, after some years of declining health.
[2] Ernest Le Gay Brereton married Lorna Beatrice Russell in Melbourne on 2 June 1910.