Earlier this year during Memorial Day week, my Dad took me over to the Clapp's Mill battlefield site. It's very nicely marked now. This heavy skirmish took place on March 2, 1781, after Pyle's Massacre and before Guilford Courthouse, but part of the same campaign. Here's a link to a site with the complete text and more: http://www.hmdb.org/marker.asp?marker=28062
It also provides a footnote in the Harvey Mitchell family story. Somewhere I'd come across a mention that two of Mitchell's relatives had fought at Guilford Courthouse on March 15, 1781, and that Harvey Mitchell's uncle William Harvey had died there. Here on this marker (above) we see that, in fact, William Harvey of the Botetourt County Virginia militia was killed at Clapp's Mill on March 2, 1781, about two weeks before Guilford but during the same campaign.