I think I have the dates right. He married a Fanny Threadgold in 1923. There is a poem in the first volume of Threshed Wheat by a W.Threadgold .. which I assume is her father Walter.
Appears he was the UK distributor for Light and Liberty.
Anyone know more about him?
I have a listing of the first 28 of the Treasury Library on here:
https://www.brethrenarchive.org/bookshelf/book-series/treasury-library-vallance/
Would be good to get a scan of the the book you mention if you get time.