Many Thanks to Sally and Rob who bought it for sharing a decent sizes photo of it, click on it to expand it.
These two pictures are from Picturesque Views of Ramsgate by Henry Moses which was published 1817 so probably drawn in 1816.
I have marked up some of this detail from the 1822 map of Ramsgate to help unscramble what you are seeing.
Next some much more modern photos, before about 1895 and probably after 1860.
With this one you can't see the writing
This detail from the 1872 map of Ramsgate is probably as close to you are going to get to the pre 1895ish photos as you are going to get. Note by this time The Harbour Commissioners Rooms has become Custom House, later to be built on the other side of the road in 1893/4. Deep red brick with matching terracotta details and copper dome type of thingy.
Apart from selling quite a few maps of Ramsgate to people on the same sort of quest for knowledge we have also sold a lot of local history books in the last few days Here at Michel's Bookshop where I work in Ramsgate.
As I say your best bet is a browse of the local history books here in the bookshop however for now.