James Sisler, my great great great grandfather, was married to Sarah Starr (his second wife).
Whitchurch is the name of the township in York County. The Whitchurch meetinghouse was located in Pine Orchard, Ontario just outside Newmarket. There is a cemetary beside this church. There is still a church there but it is no longer a Quaker meetinghouse (I don't know what denomination the church is now).
Yours truly,
Ken Sisler
Newmarket, Ontario