The drawing can be dated to 1861 on grounds of style, and the seated figure on the left is almost certainly a study for the young woman in The Backgammon Players, a large and highly-finished drawing in the Fitzwilliam Museum, Cambridge, which bears this date. A study of the two players, a man and a woman, together was with Hartnoll & Eyre in 1971, and is illustrated in the catalogue of the exhibition of Burne-Jones drawings which they held jointly with the Piccadilly Gallery in June that year, no. 2. The kneeling figure on the right in the present drawing has not been identified but may be a study for a Virgin Annunciate, possibly in stained glass.
Alternative suggestion for kneeling figure could be a supplicant in The Passing of Venus tile design (1861)