I'm sorry I don't know much about the Calvert's. I just know my ancestors have been recorded as COLBERT, CALVERT, and CALBERT. I saw you have a HIGGINS. My gg grandmother was Katherine Higgins Barnes. I have a long query on FamilyHisory.com under James and katherine Barnes if you would like to read about them. I also noticed you have a Postalthwaite the Midwest Genealogical Society has a researcher by that name you may be able to find their family history at this website. http://skyways.lib.ks.us/genweb/mhgs/ Sorry I'm not much help. Sincerely, Pam