Leslie Imroth was the only son of Gustav Imroth, a minor Randlord involved in the development of the South African mining industry. He was born in 1897, and spent the early part of his life in South Africa, before studying at Westminster School from 1910. He was admitted to Grant’s, as is recorded in both the October 1910 and February 1911 copies of the Elizabethan. He remained at the school for only one year, leaving in 1911.
Little is known of his life during this period, and it is not until four years later that further records of him begin. These records report that he joined the army in 1915, serving as 2nd Lieutenant in the 11th Hampshire Regiment. He became Lieutenant in 1916, and served in active duty for two years. He sustained wounds in action in 1918, and eventually passed away in his home country of South Africa, at Johannesburg. He is buried in Braamfontein Cemetery in Johannesburg.