Centennial history. Troy, Piqua and Miami county, Ohio This book, "Centennial history. Troy, Piqua and Miami county, Ohio", by T.C. Harbaugh, is a replication of a book originally published before 1909. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.