Hello Lynette, it's been about a year since I have worked on my Noblett family so I'll have to check my notes regarding any info on Martha Pope.
Off hand, I would say that this is not our Thomas Noblet in PA (is the date 1856 correct?) - there were several Noblett families in PA during 1790-1800's. I have Thomas Noblett (he spelled his name Noblitt), son of Isaac and Thurza, being born 1810.I have his wife's name (I don't think it was Ann) and her parents name plus a little more info but need to clarify all from my notes rather than from memory! It will take a few days to get back with you but I will post.