Lilywhites were a well known publisher and printer of postcards based near Halifax. Stuart used them to publish at least some of his cards. They all appear to be sepia-gloss real photo cards.
I have identified the cards available on this site that were produced by Lilywhites for Stuart, the can be found here. Any additions or corrections welcome as usual.
I have released revision 2 of the checklist, this version fills in some gaps and corrects some mistakes. A full list of the changes can be found in the checklist itself.
The checklist can be downloaded here.
As usual and comments, corrections or revisions to firstname.lastname@example.org please.