I just acquired another CDV of Lavinia Warren by Appleton of New York. What’s interesting is that here the photographer, A.A. Turner, is also credited on the studio imprint. I’m assuming that in order for this to have happened, Mr. Turner must have been a financial partner in the business or otherwise a major player, because the other name studios of the period never credited the camera operators, even ones who later went on to have extremely notable careers of their own (Timothy O’Sullivan and Alexander Gardner both worked for Mathew Brady at some point but are not credited on Brady’s cartes de visite, even when Gardner was Brady’s studio manager in DC and helped restore the financial well-being of the studio).
For comparison I’m including the other Lavinia Warren image by Appleton I have:
These appear to be different sittings, as her outfit and the furniture in both scenes are different.