This picture has been known as Glycera in recent years, but is clearly the watercolour reproduced as The Dancer in Cosmo Monkhouse's account of Poynter's career. The sitter holds a tambourine with which she presumably accompanies her dance, and seems to be the same model that posed for the dancer in Poynter's picture The Ionian Dance, exhibited at the Royal Academy in 1895 (repr. Monkhouse, p.27). Features, headdress and drapery are all similar.
The watercolour was exhibited at the Royal Watercolour Society in 1896 and appears in Monkhouse's account of 1897; why then is it dated 1898? It is conceivable that Poynter retouched it and altered the date, but it seems more likely that the date has been misread and strengthened by a later hand