[1][2] Ferguson was born in British North America while his father was posted overseas, but the family returned to Britain in 1864 and initially lived in London.
He achieved the rank of Major in February 1901[1] after which, in October that year, he returned to his father's estate at Pitfour.
[4] In 1904 he was appointed His Majesty's Inspector of Constabulary for Scotland and served in this role until 1927, although he rejoined the Army during the First World War.
[4] He was appointed Commander of the Order of the British Empire (CBE) in the 1920 civilian war honours[5] and knighted on his retirement in 1927.
His son, Angus Arthur Ferguson (born 1903), also became a police officer, eventually serving as Chief Constable of Northamptonshire from 1931.