There are two very different Woollen books. One done by a Seattle, Washington area, architect.The other by the late Ed Woollen of Richmond, Va.Both good and different.Ed's Library of Congress catalog number is 84-072574.As Lt. Levin Woollen, Sr., is a DAR Patriot lineage, you should be able to join on him. If you have time, I'd visit Guildford Courthouse National Park Battle Ground where the MD Continentals fought. Then Speedwell Iron Works (where they encamped)(hard to find, Then Woolem's Crossing. My grandmother was born near Reidsville, 1885. There was a farriers and wheelwrights shop at the crossroads.