Thanks for the info. I spoke this morning with Robb at Sioux River Bicycles in Brookings, South Dakota, and he told me that Dennis Sparrow had also built a frame for him and that he was to the best of his knowledge still alive and living in Missoula, Montana. Dennis Sparrow has long since stopped building bicycle frames and is now a gunsmith, however, his exact whereabouts and contact info are unknown. Robb told me that he had spoken last year to a friend of his named Len, who works at the Open Road Bicycle shop in Missoula, Montana and who had spoken recently with Dennis Sparrow. However, when I called Open Road and asked for Len, I was told that he had passed away last October and that no current employees at the shop knew anything regarding Dennis Sparrow. Apparently, Dennis Sparrow built very few frames, which is a shame considering how good and detailed a job he did on the few he built. He did take a long time to do it, but it was well worth the wait. Perhaps he just could not make a living doing it, because he wanted to be so patient and meticulous and did not produce sufficient numbers to get by.