[1] Farquhar specialised in British numismatics, especially Stuart portraiture and the Touch pieces associated with the King's Evil (scrofula).
Farquhar wrote prolifically on these subjects, particularly in the British Numismatic Journal where she published articles in every volume from 1905-1930.
Farquhar either donated (during her lifetime) or bequeathed her collection of coins, medals, badges, and touch-pieces, chiefly of the Stuart period, to the British Museum.
[8] Farquhar was made an honorary member of the British Numismatic Society in 1950.
[8] Farquhar collected coins and medals associated with her scholarly interests in the Stuart period.