I have a rather fine photograph which I am trying to date - I think it's either my great great grandmother but more likely to be the older sister of my great grandmother. The photo is labled 'William Clark, 15 Nevill Street, Southport. Permanent Photograph Patent Chromotype'. The fashion of the garments suggests mid to late 1880s to me (high collar and quite modest), and I understand that the Chromotype process was first used around 1874. From what I have read, the process didn't catch on as this type of photograph was relatively expensive - but, luckily for me, the picture has hardly faded. I have been unable to find Clark in census/trade directories etc, but I was hoping someone may be able to help me out.

Thanks

Liz