There are write-ups about the Jackson Brothers, Arthur, Walter, and Cyril, in the Prairie Grass to Mountain Pass history books. The old book has it on p. 79 and the new book on p. 222. Neither book is online, I believe, but you could access at your library if you are near Alberta. It appears that the write-ups are similar, with the newer one being an update of the older one. If you Google 'Pincher Creek cemetery', you can find lots of links to cemetery information. If you cannot access the history books, reply to this post and I will see what I can do.