Well 237, I think you could be lucky.
My view (and I am by no means an expert - just a hobby collector of silver - mainly table ware and particularly spoons. I have a rather lovely collection of georgian straining spoons).
In my view, these spoons are all Exeter marked. The Exeter assay office ran from 1700 to the late 1800s. It used to assay all silver from the Devon area. However, snobbery meant that provincial silver was thought to be inferior and the office was closed. However that has worked rather in your favour since provincial offices are now very collectable. Some collectors will collect particular assay offices and the ones that no longer exist such as Exeter.
My view is that the hallmarks show:-
1812 Exeter, George Ferris
1807 Exeter, Richard Ferris
1809 Exeter, William Woodman
1858 Exeter, John Stone (he being quite a collected chappy).
My advice is to sell at auction - you have the chance of a collector bidding who will be prepared to pay more than a dealer. I would suggest selling in Exeter. If you are not local, I would suggest going to a GOOD auction house that has regular fine art and silver sales. Someone has already posted the link for the-saleroom.com. I use that myself and can recommend it.