In GUNSMITHS OF THE CAROLINAS, there is a Patrick Hoy listed as working in Spartanburg County in 1820. Jerry Nobel in his NOTES ON SOUTHERN LONG RIFLES, Vol.1 lists Patrick Hoy as born in Antrim County, Irland 1778. Came to America in 1804. He worked in Millville, near Switzer, in Spartenburg County SC. He was also a fine blacksmith and made cotton gins and presses. He died in 1860. There is also a W.T. Hoy listed in AMERICAN GUNSMITHS, but he worked in Saugatuck Michigan (1863d). Any chance of posting some pictures of the rifle? Hope this information helps.