Take a look at the hat in my picture at left, that is the Clearwater hat of which Mick speaks. The 4 1/2 inch crown has rounded sides at the top and is lined with some sort of coarse cotton type material (I'd guess), 4 inch brim with 2 1/2 inch hand sewn leather head band on the inside. I have documented it to the CW and later period, but when purchased Ms. Clearwater (I forget her name) said it could be documented to the early 1840's (seemed very knowledgeable but I have long since forgot what source she used - seemed like she referred to the blocks they used to stretch the felt). The hat has seen considerable abuse - rain, snow, and at least once I sat on it for a good 10 minutes before I realized it - and still appears closer to new than old.