Ken, I would highly recommend the Historical Society located in the Library. They are in charge of the county archives where the older records are kept. I'm not familiar with Green Street but their is a lot of local history regarding the Younger family and the Historical Society would be your best source for that. The Historical Society is open weekdays, the archives are open during their regular hours and every second Saturday. I can't remember weekday hours but the Saturday hours are from 10-2. I volunteer from 10-12 on those Saturdays, if I can help then, feel free to drop by the archives. I'm still very new there but I'll try to help. I don't know what the Library or the Genealogy Branch has (you can check their catalog online) but they might also have general information on the Youngers available. Good luck! Kim