Thank you very much for your reply. I do have in my possession the book that you reference, a fascinating book it is. The Iddo M. Cass that I am looking for would have been the son of Iddo, the son of Joseph, that you mention. It is believed that Iddo M. Cass may have lived in Tioga County, PA prior to going to Kansas, if he did go to Kansas. I know that his son Thomas M. Cass ended up there in 1858.