Robertson was born in the manse at Forteviot, the son of Helen Bannerman, daughter of Rev.

Robert John Robertson, minister of Forteviot, Perthshire.

He was appointed a Lord of Appeal in Ordinary on 14 November 1899 and created life peer as Baron Robertson, of Forteviot in the County of Perth.

At this time he lived at 19 Drumsheugh Gardens in Edinburgh's West End.

[1] He died on 1 February 1909 at Cap Martin on the south coast of France near Monaco, aged 74.

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