Known as Major Robert Ferguson of Assynt, Ross-shire. An officer in the 79th Regiment of Foot, he rose to become Colonel of the regiment, and a General in the Army. He was of the Fergusons, who were an ancient Highland family, he lived at Muirtown, Fifeshire.
He lived at no.5 Bolton Row, London.
In politics he supported the Liberal agenda. He wanted electoral reform, male suffrage and the secret ballot.
He supported Triennial fixed parliaments. He voted for revision of the Corn Laws and Income tax
He wished for abolition of the tax on knowledge, voting for universal schooling.
He was in favour of diluting the prelacy, redistributing to local vicars and disestablishment. Ferguson resigned his seat in the House of Commons in 1862, by the procedural device of accepting appointment as Steward of the Manor of Hempholme.