Thanks, Ellen. My error lay in spelling - the name is
entered only as Rohoic. I found that the stream goes on
roughly north-south line by the dividing line between
Petersburg and Dinwiddie to Appomattox Riber. Point at
Appomattox River is: 283488E 4122362N. From topozone.com
Thanks to all.
The closest spelling in Site Find is:
Rohoic Farms, Dinwiddie Co, N37d12m W77d29m