I am searching for a copy myself, specifically for the Layton family. My mother's maiden name was Layton. I have borrowed a copy from my aunt whose last name is Layton. I saw a response to your question with a web site that listed Dan O'Rourke's address in Overland Park, KS. Have you contacted him?
Are you referring to Ignatius Layton who was born 24 Aug 1768,
who is the son of John Layton, Sr. and Jane Pearce. It seems they had two sons named Ignatius. The second one named Ignatius was born 27 Feb 1774. I was able to trace my lineage back to John Layton, Sr.