Colonel Sir James Hayes Sadler KCMG CB FRGS (21 May 1827 – 9 January 1910) was a British diplomat and civil servant.

In 1854 Sadler was commissioned into the Royal Sussex Militia Artillery, a newly formed part-time home defence unit of the Royal Artillery (RA). (It was retitled the 3rd Brigade, Cinque Ports Division, RA, in 1882 and Sussex Artillery (Eastern Division) RA in 1889, before becoming the Sussex Royal Garrison Artillery (Militia) in 1902.). He was promoted Lieutenant the following year and Captain in 1858. He was promoted to Honorary Major in 1874, and full Major and Honorary Lieutenant-Colonel in 1879. He resigned his commission in 1882, and was appointed Honorary Colonel of the unit.[1][2]

Following his retirement from the militia, Sadler became a diplomat. He was Consul at Chicago, and most of the Midwestern American States in 1887.[3]

In 1893 and again in 1893-94, he was Chief political resident of the Persian Gulf (for Bahrain, Kuwait, Oman, Qatar, and the Trucial States). He subsequently held a number of senior governmental roles in East Africa and the West Indies. He was Resident and later Consul general in British Somaliland from 1897 to early 1902, when he was appointed Commissioner, Commander-in-chief and Consul general for the Uganda Protectorate.[4][5]

He was elected a Fellow of the Royal Geographical Society in December 1901.[6]

Sadler died in 1910, and is buried in Brompton Cemetery, London.

His wife, Sophia Jane, Lady Sadler, died on 12 February 1902, and is buried next to him.


  1. ^ Army List, various dates.
  2. ^ Hart's Army List 1899.
  3. ^ "No. 25688". The London Gazette. 1 April 1887. p. 1914. 
  4. ^ "Commissioner in Uganda". The Times (36638). London. 14 December 1901. p. 11. 
  5. ^ "No. 27403". The London Gazette. 4 February 1902. p. 709. 
  6. ^ "Court circular". The Times (36635). London. 11 December 1901. p. 9. 
Diplomatic posts
Preceded by
Stuart Godfrey
Chief political resident of the Persian Gulf
Succeeded by
James Crawford
Preceded by
James Crawford
Chief political resident of the Persian Gulf
Succeeded by
Frederick Wilson
Preceded by
William Ferris
Consul-General of British Somaliland
(Resident 1897-8)

Succeeded by
Eric Swayne
Government offices
Preceded by
Sir Harry Johnston
Commissioner of Uganda
Succeeded by
Hesketh Bell
Preceded by
Sir Donald Stewart
Governor of the British East Africa Protectorate
Succeeded by
Sir Percy Girouard
Preceded by
Sir Ralph Champneys Williams
Governor of the Windward Islands
Succeeded by
Sir George Haddon-Smith