What is the meaning of ‘Halifax Cheesemonger’

What is the meaning of ‘Halifax Cheesemonger’

The passage below is from The Library: A Fragile History by Andrew Pettegree.

In the second half of the nineteenth century, the established subscription libraries, serving the needs of local professional classes, spawned a variety of literary and scientific societies, some with considerable collections: 20,000 volumes in the case of the Halifax Literary and Philosophical Society. Huddersfield had a law library, a medical library and a library devoted exclusively to works in foreign languages. These more learned institutions were also forced to confront the insatiable

demand for fiction, often by taking out a corporate subscription to Mudie’s or W. H. Smith’s. At the other end of the market, numerous sometimes short-lived commercial libraries offered a generous range of recreational reading. Some of the more successful were run by local printers, like William Milner, who turned out massive cheap reprints of the works of Burns, Byron and Longfellow, or

William Nicholson, publisher of the no doubt bestselling Poems by a Halifax Cheesemonger.

I cannot figure out the meaning of ‘Halifax Cheesemonger’.

No dictionary shows any hint about this phrase.

I only know cheesemonger is a merchant who specializes in cheese and Halifax is the name of place in England.

How can ‘a Halifax Cheesemonger’ write poems and that it becomes a bestseller.

Nothing makes any sense to me right now.

Thanks in advance.