Thanks for your additions, all!
The H
eywood thing seems to be a typo, at least the Catalogue of Copyright Entries entry lists James T. Haywood as composer:

And yup, that is indeed the classic, 'Parson Brown'-pretending, Felix Bernard-Richard B. Smith "Winter Wonderland" we all know and hear every (every!) December. I guess FDH had the British publishing rights to it at the time.
"P. de Ware" I have been unable to conclusively identify - he may be the South African composer Paul Devere aka Paul de Ware (Lewis).