Alleghany wasn't formed until 1859 as I recall. Try the 1860 Wilkes Census: Traphill. Image 31 of 199: 1860; Census "Place: Lower Division, Wilkes, North Carolina; Roll: M653_918; Page: 16; Image: 33.
Joseph Blevins 60 + Nancy Blevins 60 + Mary Blevins 35 + Alvis Blevins 25 + Eli Blevins 22 + Nancy Blevins 6 + Alvis Blevins 3 + Caroline Combs 23 + Nancy J Combs 1.12
Living next to
William Combs 56 + Libey Combs 58 + Harrison Combs 21 + Milly Combs 18 + Meridith Combs 15 + Miry Combs 12."
Sorry to be late to the party, but I am back 3 years later with some new information. The Harrison Combs I was looking for is indeed the one listed above, according to a county marriage book he married Nancy Blevins(jr). But that is all I have, I can find nothing else on either people.