J. J. Foster, Chats on Old Miniatures
“ When one considers the beautiful effects which have been produced in it by the hands of masters, and especially the valuable quality of permanence which such works possess (for an enamel by Petitot is as brilliant to-day as it was when it was fired) , one must wish that artists would devote themselves to so satisfactory a record of contemporary portraiture. Miniature painting upon ivory, charming as it is in its delicate effects, is, as we all know, subject to the great defect of being fleeting in its nature, when exposed to light. ”
