I know that Henri Victor Leménager was a photographer in Watford High Street between about 1872 and 1887, when he emigrated to the United States. I now have added two further examples of the carte de visite that he produced. One relates to the earlier period when he had a studio at Bushey, and the other has yet another back design relating to his Watford studio.
Two of the pictures involve the same chair, and two more may involve the same chaise longue. If you know of any other examples of his work that could help with more precise dating his photographs please let me know.