My search has turned up the date for Mary's death as August 19,1839. Marcus died from his scond stroke on November 3,1856. He had remarried and was buried in Winchester cemetery. Most likely Mary was buried there as well. The cemetery was established in 1828 and the last burial was 1874. The cemetery fell to disrepair, L&NRR went through a portion, High Street goes through a section, and the city stables were built over another portion. The cemetery is now a park, the RR gave way to I-40 and the city stables are a vehicle maintanence facility for the City of Memphis. A plaque claims his burial site is at the maintanence facility. Elmwood Cemetery became the new cemetery for the city and they have a Marcus and a Mrs. Mary Winchester listed there. They may have been moved from Winchester cemetery. I attempted to locate these graves on my own(with some help from the office) bu didn't locate their markers. The dates they had didn't match up to their deaths but may have been their reburial dates. There are some other sources here for me to check out.