Covering an Old Pair of Stirrups

This is the first upload in a series on rebuilding an old Harpham Brothers (type) Saddle. I bought this saddle from a fine lady in Merlin Oregon about a year or so ago with the intent of just taking it apart, washing all of the dirt out of its innards, saddlesoaping, oiling and putting it back together. didn't happen that way. There were cracks and a few outright broken pieces. The tree is sound though and I'm loving the way it's built (they / we don't make 'em like that anymore), so I get to learn how this maker did things. Obviously a Harpham pattern, there were flaws that kept it from aspiring to their makers stamp. Built around the turn of the 20th century, the Harpham Brothers Saddlery hadn't produced saddles themselves since about the mid 1880's. They farmed out their work to makers all across the west, so there's no telling for sure exactly where this one was made, nor by whom. All I have is a mysterious stamp on the back of the cantle "R. L." that's had me scouring the internet for the last few months searching for any makers who used this mark. Needless to say, should any more knowledgeable fellows than myself have further clues kick me down the info below. Thanks for watching