In the finished picture, now in the Calouste Gulbenkian Museum, Lisbon, none of the girls have such long hair as in these studies. There is, however, another untraced version of the subject, in watercolour, which was begun in 1868, some five years before the large oil at Lisbon. The latter was completed in 1877, so that studies for the two pictures span a possible nine years. These studies (see also 2001a and b), and also 2016, are stylistically characteristic of the very early 1870s and so could be related to either of the 'Mirror of Venus' pictures.