 Of particular note were the unusually long radial lines projecting in many directions from the bodies of ore richest in thorium, uranium and zirconium.Hidden named these occurrences "stars" and eagerly sought for them, as positive "pointers" to ore. At one point he noted a redness of skin and burning sensation when mining these, that he attributed to radioactivity, which was poorly understood at the time.Mineral specimens from Baringer Hill eventually found their way into collections across the country, including the Houston Museum of Natural Science, the American Museum of Natural History in New York, Harvard University, and the University of Texas at Austin.