I don't know if I can be of any help, but I can try. Do you have any dates for Mary and Columbus - do you know Mary's maiden name?
FYI - I found some death certificates for the following - possibly a child of Columbus Pollard and Mary ???:
Cassie Jane Pollard b. July 23, 1884 Hickory, NC (m. Joseph Allman) - Parents Columbus Pollard & Mary ???
Lawrence Durant Pollard b. July 30, 1909 NC - Parents Columbus Pollard & Mary Sides
Essie Pearl Pollard b. Nov 29, 1889 Catawba, NC (m. ??? Reitzel) - Parents Columbus Pollard & ?
Mary Lou Pollard b. July 22, 1897 Catawba Co, NC (m. ??? Wilson) - Parents Columbs Pollard & Mary Pyatt
Diane Pollard Keiser