I see that there is a discussion about the Debray’s 26th Cavalry uniforms and weapons. I think I can help resolve some of the questions you have. I own Col. Debray's original campaign slouch hat, which I loaned to the Texas State History Museum for quite a while. I also have a copy of photo of Debray and his Staff. In the picture Debray has the hat in his lap. A friend of mine ended up Col. Debray's engraved Lemat pistol; but unfortunately, has since sold it. I wish he had contacted me first. Anyway, I can email photos to help you guys with your discussion.
Alex
Austin, TX