Abraham or Abram Robertson FRS (4 November 1751 – 4 December 1826), was a Scottish mathematician and astronomer. He held the Savilian Chair of Geometry at the University of Oxford from 1797 to 1809. Robertson was born at Duns, Berwickshire, the son of Abraham Robertson, “a man of humble station”. He attended school at Great Ryle in Northumberland, and later at Duns. At age 24, he moved to London, he had hopes of travelling to the East Indies, but his patron died. He took himself alone to Oxford, where he sought to finance himself by opening an evening school for mechanics. This failed, and he served for a while as an assistant to John Ireland, a local apothecary. He then gained patronage from John Smith (1721—1796), the Savilian professor of geometry. Robertson completed a Bachelor of Arts