I can't find any sold or for sale photographs by the artists. Hard to find, no interest in them or I just can't search?
Seems like a fairly prolific studio, with archives held at various places. There are a few WWII era portraits (what they are known for) on worthpoint, but they didn't sell for much (5-10 dollars). I think it's a picture that would sell on subject matter and composition, rather than who took it.
I'm going to agree with Kronos here: the subject matter would most likely be what sells this or any other given Ramsay & Muspratt photo. (Note, too, that a number of R&M photos show the spelling as Ramsey - even on the back imprint!) I did a bit of looking around, and I didn't find much info regarding sold or for-sale prices. (As Kronos pointed out, there ARE a lot of archives - and even a book - showing R&M works.) These are all I located in my rather cursory search: There's one, a B&W studio portrait, of Vivien Greene (wife of Graham Greene) and her children, currently listed @ £98, but I have no idea whether or not it will sell for that (really, I would doubt it): https://www.sotherans.co.uk/2095098 Ebay UK has an RP postcard (of Magdalene College, Cambridge) listed @ £3.50, but, again, it's a postcard, and it would most likely appeal to someone familiar with the college, and not necessarily the photographer: http://www.ebay.co.uk/itm/Cambridge...098788?hash=item466596e5e4:g:LDYAAOSwiONYQMQG It is also possible to buy new prints of a number of older portraits here: http://www.npg.org.uk/collections/search/person.php?LinkID=mp07847&displayNo=60 (In addition, note that the studio had new owners after the early to mid-1970's or so.)
Both are of King's College Chapel in Cambridge, which has the world's largest fan vault, the ceiling you see in the first photograph
