I found that Nellie was buried in the same cemetery as a sister-in-law, Anna Mae (Craig) Richey -- whom she would have been related to by a previous marriage. Nellie's funeral arrangements were made by her niece, Joan Richey Holland, daughter of Anna Mae.
Also found Mr. Archibald E. Craig at the same cemetery - Nellie was listed as his wife when he died July 1, 1960.