Dear Lynn, just a few more ideas.
I have looked at- Immigration of the Irish Quakers into Pennsylvania, 1682-1750. By Albert Cook Myers.
There are many references to the Marsh family. I have seen six pages and have tried and failed to make an attachment to this post.
Here is some of the information.
Joshua Marsh presented a removal document from the Grange Meeting for himself wife Elizabeth (Rogers) and their children Jonathan, Peter and Abagail. Dated 2nd April 1736 and signerd by 24 members of the Grange meeting.
John Marsh son of Joshua presented a similar removal document naming his wife Elizabeth (Hobson)
Later pages identify this John as having sons John, Jonathan and William
They bought land at Nantmeal, Chester Co. They also attended the Goshen Monthly meeting.
Two years later Joshua's son-in-law Thomas McMillan wife Deborah (Marsh) and family arrived.
I still hold these pages but can't work out how to send them.
Cheers,
Hilary.