Mary Vivian 1781 has been found! Hallelujah! This is a good lesson on checking, checking and double checking, and don't think that what is in print is the whole story--i.e. Vivian's Visitations. Illogan transcripts (Bawden's) LDS # 1849636 show the following children for Joseph and Ann Vivian: Ann, chr 1 Nov 1783, Hannah 8 Oct 1786 (not on Vivian's Visitation's pedigree), and Mary chr 5 May 1781, not on Vivian's either). Mary's christening verifies the age given at her burial (1815) as 34. Mary is my 3x g grandmother and this genealogy puzzle piece is a major one in my family tree. I have a bit more information I have collected on this family during my search for her. Let me know if you have more, or would like what I have found.