I am in dire need of the birth date or age at death of Mary McIntire Alexander who died in County Londonderry on June 27,1878. Her husband, Joseph Alexander, died in May 1866. Letters from two of their daughters, telling of their mother’s death, were written from Maghereagh. They were with her when she died. Can someone give me some guidance? They were land owners and Covenanters. I don’t know what cemeteries might be in that area. Are there cemetery lists availlable? Is there anyone who might be able to help find this date?