Probably nothing definitive. I have photocopy of intermittent pages of "The Eno and Enos Family in America" by Douglas C. Richardson, last revised 1984. I copied parts to be able to distinguish the Eno family from my Enoses. Paragraph on John & Mary lists records of their owning land in Gloucester, NJ, but lists only 4 daughters, no son Richard. Another treatise, "The Name and Family of Eno or Enos" by Media Research Bureau says John and Mary had only female issue.A third treatise of extracts from various books cites documents showing John lived in Gloucster but doesn't seem to list his children.Will be glad to send photocopies of what I have - useful for sources cited, if nothing else - if you want to send me your mailing address. Email is firstname.lastname@example.org.