Thank you Marion for your note.
We have waited these years for answers and so can wait longer until you are able to give us your information. We have same list of siblings for our John Grant with exception of your Peter, given to us was the name Patrick. We have Janet2 married to a Peter Grant, Isabella married to a Simon Fraser, and Helen married to a Farquhar McRae.
Just to keep you straight I am descended from John Grant and his 3rd wife Mary McIntire married in Montreal, Quebec, Canada - October 1787.