James Hewson was the sub-editor of Plumbing and Decorating.
JW's contact with one James Hewson occurred around 1886.
It is not clear if he was the same as J. James Hewson, playwright, poet and short story writer, who is recorded as publishing miscellaneous works between 1891 and 1898.
Another possible identity is the Welsh-born journalist, James Hewson, who was recorded in the 1901 census as living in St Pancras, London.
UK census 1901; British Library Catalogue.