Denver Public Library downtown by the Art Museum also has the Casey Collection. They are also a region depository for federal papers (I think that's what it is) and also has a massive western photograph section, should anyone be interested. The Colorado Genealogical Society offers free classes on Saturday, 9-1, for 'beginners.' A beginner I'm not, but was exhausted trying to keep up with what the woman was offering. I had pages and pages of things to check out. Maureen in Lakewood, CO (planning a Casey trip in a few weeks)