Reilly 245-6. Book not in Reilly.

"Oxenham not used as pseud. Name changed by usage, possibly by deed-poll" -- Reilly 245

John Oxenham, aka, William Arthur Dunkerley (November 12, 1852 - January 23, 1941) was a prolific English journalist, novelist and poet. He was born in Manchester, spent a short time after his marriage in America before moving to Ealing, west London, in the 1880s, and then to Worthing in Sussex in 1922, where he became the town's mayor.

He wrote under his own name, and also as John Oxenham for his poetry, hymn-writing, and novels. His poetry includes Bees in Amber: a little book of thoughtful verse (1913) which became a bestseller. He also wrote the poem Greatheart. He used another pseudonym, Julian Ross, for journalism. Dunkerley was a major contributor to Jerome K. Jerome's The Idler magazine.

He had two sons and four daughters, of whom the eldest, and eldest child, Elsie Jeanette, became well known as a children's writer, particularly through her Abbey Series of girls' school stories. Another daughter, Erica, also used the Oxenham pen-name. The elder son, Roderic Dunkerley, had several titles published under his own name.
--Wikipedia