I have an old early 1970's Michigan County Plat map book. This little spur shows there, on page 70. The spur comes off the mainline just north of Unionville, switch points facing south. Curving to the west, the line runs along the north side of Leonard Road, kinda' like a front yard railroad for the few houses there. I never knew this little spur existed until now. Thanks Jeremy and R. Bedell for bringing it to attention.