Background
Robertson was born at Kelso or Edinburgh. His father, at one time assistant-secretary of the Bank of Scotland, was engaged in business at Glasgow. His mother, Juliet Parish, was the daughter of a Hamburg merchant of Scottish extraction.
Robertson accompanied his father to South America in 1806.
On the cession of the city to the Banda Oriental, he was sent home by his father, but in 1808 sailed on his own account for Rio de Janeiro, where he was employed as a clerk for three years.
Education
He was educated at Dalkeith grammar school.
Career
He landed at Montevideo on the day after its occupation by the British forces under Sir Samuel Auchmuty. Robertson now tried to open up trade with Paraguay. He sailed for Buenos Ayres with goods, but was stopped by an accident at Corrientes, on the banks of the Paraná River.
In 1817 Robertson returned to England in 1817, and established connections with London, Liverpool, Glasgow, and Paisley.
Sailing for Buenos Ayres in 1820, he commenced trading with Chile and Peru, and landed at Greenock in 1824 or 1825, with a fortune of £100,000, as the representative of some of the South American republics. Ruined in 1826, he went to South America with the object of recovering part of his fortune, but failing to do southern
He returned to England in 1829. Intending to devote himself to study, Robertson entered Corpus Christi College, Cambridge.
But in 1833 he moved to the Isle of Wight for his health.
He was in London in 1834 for business reason. He died at Calais on 1 November 1843.