The rustic and picturesque frame dervies in part from an overmantel pattern in Thomas Johnson's Collection of Designs, 1758, pl. 31.
A similar overmantel mirror with a Chinese-Export reverse mirror painting-on-glass, is illustrated in P. Broome, The Hyde Park Collection 1965-1990, Hong Kong, 1989, p. 155. The painting also shows a lake landscape with seated shepherdess in the foreground.
Another related Chinese (Canton) painted 'landscape' glass with pastoral Chinese scene of a shepherdess seated by a lakeside with distant pavilioned hills, formed part of the East Inida Company furnishings introduced around 1750 at Osterley Park, Middlesex (illustrated in a later frame in M. Tomlin, Catalogue of Adam Period Furniture, London, 1982, L/7).
A similar composition, including some of the same figures and animals, featured in a mirror with japanned frame sold anonymously, in these Rooms, 25 June 1981, lot 16.