The counties are too numerous for me to print out all the codes. What counties are you interested in? I could provide a brief key for a few counties. Do you have any general books on North Carolina--such as Thornton Mitchell's Index of Testators (or similar title) of North Carolina? If so, the introduction gives a good run down of all the codes and a brief description of the county and its probate holdings. Same with the marriage bonds which are on microfiche at many LDS family history centers. E.W.Wallace southern California