In 1930 Robertson won the Cowan Medal and she obtained the approval of Sir George Macdonald, then Honorary Keeper of the Hunterian Coin Cabinet.
[2] After graduating with a Master of Arts with Honours in Classics in 1932, she started her studies for a second MA, this time in archaeology, at the University of London.
In London, she obtained different scholarships to participate in Mortimer Wheeler's excavations, to work at the Coin Room of the British Museum, and to several academic papers on numismatics.
[4] She graduated in 1934, having acquired considerable experience in archaeological methods, particularly as result of her participation in Wheeler's excavation of Maiden Castle.
[8] Robertson was a prolific excavator of Roman sites, notably Castledykes near Lanark (1937), Duntocher on the Antonine Wall (1947–51), Birrens in Dumfriesshire (1962-7), and Cardean in Angus (1968–75).
Her proposers were Alex Haddow, Robert Alexander Rankin, Stuart Piggott, Sheina Marshall, Edward McGirr and Agnes Miller.