I believe we had contact with each other about this family about 6 yrs. ago. Have you been able to find out anything new about Jane? I do know of 1 line of MUIRs who were in Bowmanville, but with that line, the father (John MUIR) was b. about 1835 in Ireland and the mother (Mary SHAW) was b. abt. 1843 in England. If your Jane was b. in Ireland, it may be rather difficult to trace her back further. For whatever reason, the records from Ireland seem to be very scanty.