|John Maynard, died 1876|
While it is possible to make some conclusions about the dating of single carte de visite of unknown individuals the ideal situation is to find a collection of named photographs, by known photographers, with negative numbers, and where dates can be at least approximately ascertained.
I recently acquired five cards of the Maynard family - who turned out to be farmers at Cottered. Two were taken by George Avery of Hitchin, one by T. B. Latchmore of Hitchin (who took over George Avery's business), one by Arthur Elsden of Hertford, and one by an unknown photographer. For details of the Maynard family, and the CDV dating, see Maynard, Cottered, 19th century and the photographer pages.