So, I managed to find the time the other night to finish off my project to be submitted for Kingdom A&S. It's a fairly basic pouch style, without any real ornamentation. But, it's functional, based on a period style of pouch and completely hand-sewn. Not the complex project I had hoped to do, but at least its something.
I used a pattern from my Period Patterns #93 (Bags, Purses and Pouches (http://www.mediaevalmisc.com/pp-093.htm) as the starting point. I think next time I might enlarge the pattern a bit though, the pouch is pretty small for functional use (although my documentation says they were made in a variety of sizes and shapes depending on the person).
I used some of the really nice red leather that we picked up in Hamilton this summer, probably about 4-5oz. I suspect the tanning process was modern (Chrome tanned) given the colour and softness of the leather, but for a beginner level project that's fine.
I've started pulling together my documentation. So far I have about 6-7 links to online images from period illuminations showing un-ornamented pouches like this one, without a buckle or strap (they most often had a strap to keep them closed from what I can tell but not always).
In addition to my links to period images, which I will print out, I also have Purses in Pieces, which has several pages of information about the history and use of this style of pouch. There's also some illustrations and pictures of archeological finds. I'll also have to check the documentation in the Period Pattern set, they sometimes have relevant information about the patterns (although probably all pulled from Purses in Pieces originally anyway).