Hello Mary Sue, I have searched Vols.1, 2 and 3 of the Bienville Parish Cemetery Record Books compiled by George Rogers Park. I find no surname of DIAMOND at all. There are a great number of WIGGINS buried in Providence Cemetery. There are also 3 WIGGINS in Old Castor, 3 WIGGINS in Mill Creek, 2 WIGGINS in Old Ridge Church Cemetery, 8 in Pleasant Grove, 16 in Springhill Baptist Church Cemetery; but, none with the name of Mary Ann, Mary A, or M A. Do you have anything to give you her birth date or age at death. The only female I found that died in the time frame mentioned is a Mary M Wiggins, died 1892. All the others are in the 1900's. Have you checked the surrounding counties? You might have some luck there. Good luck in your search. Doris