This small but perfectly fashioned treasure from the 1850s brought me great joy today. For years I have looked for a stereoscopic viewer with a TR Williams proprietary plaque on it. I knew of two in the world, neither of which were accessible to me. Thanks to my dear friend Dana Kubick, I now know of three, and the third has found a loving home with me. See four parallel stereos, then four crossed eye versions, … oh yes – a mono ! THANK YOU DANA !