The present miniature is adapted from Henry Edridge's drawing dated 1803 in the Royal Library (Oppé, 198) and may be further comapared to the enamel of Queen Charlotte by Henry Bone, inscribed on the reverse after a Drawing by Henry Edridge A.R.A. in the Collection of Her Majesty the Queen (R. Walker, Miniatures in the Collection of Her Majesty the Queen, Cambridge, 1992, no. 750, p. 276). Edridge's drawing shows the Queen sitting under a tree at Frogmore and wearing an oval miniature brooch of George III whereas Bone's enamel shows Queen Charlotte seated on a green and gilt chair initialled CR with a pillar and curtain background. This miniature by Richard Collins is a further variant on the subject.