In his posting of Feb 12 2004 on this site, Norman MOYLE invited interested peopke to contact him about gaining access to the private MOYLE Family website, of which he is co-administrator.
This famiy is recorded in the MOYLE A Tree on that site.
There are a few variations from the information you have set out (Stephen was the first child of Edward and Elizabeth, for instance) and there is additional information, including dates of baptism of most of the children.
The file however doesn't include any additional information about the last three children (identified in the Tree as Mary, James and Martha,(not Mary Ann). As the dates shown are dates of baptism, not birth, these three could possibly be the children of Edward but biologically I wonder if his wife, Mary could have produced these last three children at age 50+ years so your information that the children were in fact grandchildren might well be accurate.
Could I ask what was the source of your information?