For Cannon-1970 (1809-1865), besides the six children that I can verify, there are 5 additional children that I know nothing about. They have only 1 source - a FS Death index card. Eg: "Delaware Vital Records, 1650-1974," database with images, FamilySearch(https://www.familysearch.org/ark:/61903/1:2:Q288-S3BJ : 16 April 2022), Entry for Charles Franklin Cannon, 1853; citing Death, Delaware, United States, Delaware Public Archives, Dover; FHL microfilm . Are these children that died in infancy? I checked census records? How can I find a birth record for them?
It is my impression the the image of the index card is what is in the Delaware Public Archive. I went back and there is some additional information about the original document: Death and Burial Index, c 1700-1960, Bracken - Clynch with folder number and image number. I will try to investigate that further