[2] He was born to John Thomas Hallett (1830–1915) and Caroline Maria (1841–1915) on 28 October 1883 at Priors Hardwick, Warwickshire.

From 1920 to 1924, he served as Secretary to the government of Bihar Province, and later he was appointed Officiating Commissioner in 1929.

[4] Prior to his last appointment, he served as governor of the United Provinces for a period of five months from 17 May 1938 to 16 September 1938.

[5] He was among the other officials to formulate an action plan with Governor-General of India, Lord Linlithgow regarding the Khaksar movement and detention of Inayatullah Khan Mashriqi.

He also illogically announced that Kumaoni soldiers to be thieves and dacoits at a lecture at Lansdown in Northern India in 1945, he was referring to the soldiers of Azad Hind Fauj of Netaji Subhas Bose.