This is where Frank's and Mr. Oakley's works (photographs) are being sent in chapter 9. Historically it is a place of scientific education and research.(https://www.rigb.org/)

Cornwall is a small region of Britain that is notably ethnically and culturally distinct from England. In The Romance of a Shop, Frank Jermyn, the artist who lives across from the Lorimer Sisters, is from Cornwall.

21 Westland Row, Dublin

21 Westland Row, Dublin

Mentioned in chapter 8, Harley street is the location where Frank is going to a dance and the sisters wonder how many miles he has to walk to dances since it is far from their middle class area. It is located in an upper class area, and it is also said to have a large amount of medical organizations that have increased over the years. 

The exhibit where Sidney Darrell, A.R.A.'s pictures are held. Historically, the street has been known to hold prestigious fashion retailers. 

Lord Watergate lives in this area. Gertrude went to photograph his dead wife.

Phyllis and Gertrude were temporarily staying with the Devonshires, who took a holiday to this area, while they were sorting out living arrangements after selling their home and starting the shop. This area resides on the coast of North Yorkshire and was popularly frequented for holidays being a popular resort location. Presumably the Devonshires coming from an affluent background have a home there amongst the wealthy.

20 Upper Baker Street in London is where the Lorimers rent their rooms and the photography studio. Historically, several photography studios had business at this address from 1877-1899, according to Michael Pritchard's A Directory of London Photographers 1841-1908.