Edward Grosvenor Paine. Inventory of the miniatures in the Fredrick collection. 1960, p. 6, no. 41, calls it a work either from the school of Charles Boit, or a copy after Boit; dates it about 1690.
Fabienne Xavière Sturm. Letter to Katharine Baetjer. December 11, 1995, with Hans Boeckh, proposes a date of about 1700 and suggests comparison with the work of the Geneva enameler Jean André; adds that it could also be German.
Graham Reynolds with the assistance of Katharine Baetjer. European Miniatures in The Metropolitan Museum of Art. Exh. cat., The Metropolitan Museum of Art. New York, 1996, p. 184, no. 244, ill., date it about 1670 on the basis of costume, and note that "the marked stippling in the flesh tones is akin to that of the enamelists of the Northern schools, working in the manner of Paul Prieur . . . or the Huaut brothers".