Which preposition to use with fishmongers

in Occurrences 2%

The founder of this fashionable gambling place was at one time a small fishmonger in either the Strand or Fleet Street, I forget which, and lived there till he removed to St. James's Street, where he became a fisher of men, but never in any other than an honourable way.

of Occurrences 2%

We have said that he kept a good table; for presents of game poured in from the gentlemen's bailiffs in the neighbourhood, fish from town to be repaid by summer visits, and if the fishmonger of the place was overstocked, the first person he sent to was our bookseller.

at Occurrences 1%

Mr. CECIL CHESTERTON, addressing a meeting of non-party fishmongers at Billingsgate last week, stated that he had heard that when Mr. GODFREY ISAACS informed the LORD CHIEF JUSTICE that Mr. HANDEL BOOTH had retired from the Dublin Police Inquiry Lord READING OF EARLEY burst into tears and hid his face in his wig.

Which preposition to use with  fishmongers