In the book it says that Martin was the son of Lewis and Peggy (Margaret) Lowman. They lived in Burke County, NC. I'm not sure what Elizabeth Howard's parents names were; they might have been Benjamin and Mary. It does state that Martin and Elizabeth got married in Lincoln County. At one time all of the western part of North Carolina was Burke County in the early 1700's; before it was divided into more counties. The ladies that wrote the book might be able to help you more. Their addresses are:
Mildred Lowman Speagle; Route 3, Box 41-C; Vale, N.C. 28168 and Margaret Lowman Smith; P.O. Box 114, Hildebran, NC 28637 and Ruby Lowman Young P. O. Box 83, Hildebran, N.C. 28637.