Marilyn - There are mentions if Isaac Horton and others related to him in Tioga County, PA. They were in many ways nomadic in that Isaac was a builder of mills and was in ohio for awhile building mills in pioneer days but he did return to tioga County. There is another Horton Book, The Hortons In America by Adelaide Horton White 1929 - also found in major State Libraries and some large city Public Libraries, and it is an update of the earlier Horton Chronicles mentioned earlier and quoted by Lillian Horton Altpeter. It is reprinted I believe by a publishing company in Salem, MA. sorry I don't have the name of the publisher at hand but will look it up when I return. It had more copies made than the former book and includes all that was in the former book as well as corrections and additions. The reprint I have not seen but I presume it was as it originally was printed. Any genealogical book usually had errors and this one was no exception. Hang in there - Sorry I can't help you more on the Hyatts. Donna