Major General Sir William Grant Macpherson, KCMG, CB (27 January 1858[1] – 15 October 1927)[2] was the colonel-commandant of the Royal Army Medical Corps, and the author of its official history.

Whilst he was there he also found time to be the Editor of the Gibraltar Chronicle and was active in horse-racing and polo matches.

In 1904 he was appointed senior medical officer to the North China Command, and during this posting was attached as an observer with the Japanese Army in Manchuria for 2 years during its operations in that region during the Russo-Japanese War.

The results of his experiences produced his Medical & Sanitary Reports from Officers attached to the Japanese Forces in the Field.

In 1910 he was appointed as PMO at Malta, also remarrying this year to Geraldine, the daughter of General Sir John Doran, of Wexford, Ireland.

After the entry of England into the opening of the conflict in August 1914, Macpherson relinquished his post at the War Office and entered France on 7 October 1914, with the rank of a brigadier-general in the Army Medical Service Staff, first occupying the post of Advisor attached to the Indian Corps.

In March 1916 he returned to France to re-join the BEF there and assumed the post of DDGMS at General Headquarters, a position he retained until June 1918, when he was retired as having attained the service age limit.

Prior to the war in 1909, he translated from German The Strategical and Tactical Employment of the Medical Service, as Carried Out in an Army Corps; with a Series of Problems by Maximilian Ritter von Hoen.