Thanks for replying Frank.
Jane Erskine had children with William George? Irwin/Irvine b. Ireland.Their first daughter,Jane Irwin married name Leonard was born in Port Glasgow c. 1826 and were followed by Olivia Mary Smith Irwin,William Erskine Irwin,Sussannah Irwin and Cecilia Irwin.
Jane Irwin later Leonard,Sussannah and Cecilia emigrated to Australia.Jane Leonard moved back to Scotland with her husband William who managed an iron works at Coatbridge.They moved back to Australia leaving a son Henry. Olivia married Thomas a son of the famous cartographer William Bald and died in Kent,England.We don't know what happened to William Erskine Irwin. He disappeared before the 1851 Census as did the parents.William was too young to leave home so I am guessing he died.There may have been other sons who left home before the 1841 Census we do not know about.
I don't know where William and Jane Irwin nee Erskine were buried.Episcopalians don't usually get buried in their Church yards I am told.William died at Coatbridge but I don't know where Jane died.
I have a brickwall.