[1] After receiving a classical education at the Royal High School and subsequently at the University of Edinburgh, he was employed as a clerk for five years in the excise office, in which his father held the post of deputy auditor.
[2] After the death of his father, who had opposed his desire to become an artist, he went to London and entered the Royal Academy schools.
His first contribution to the exhibitions of the Royal Academy, a St John in the Wilderness, appeared at Somerset House in 1806, and from that year onwards Geddes was a fairly constant exhibitor of figure-subjects and portraits.
[2] Geddes made his chief success as a portrait painter, but he produced occasional figure subjects and landscapes, and executed some copies of the old masters as well.
[2] His portrait of Alexander Oswald of Changue FRSE is held at the Glasgow Museum Resource Centre.