This problem is given in the "Batsford Chess Encyclopaedia" by Nathan Divinsky (published 1992) as a representative example of the work of ....wait for it.... Comins Mansfield!
No source is given, just the year 1924.
We know that Mansfield composed at least four three-movers, but Barry Barnes was never able to authenticate this one when compiling his "Complete Mansfield". Mansfield did not record the problem in his scrapbooks.
Does anyone know the identity of the real composer?