My family was recently searching through my grandparents house and we came across a textbook that my grandfather used in high school. He was born in 1920, so this text was used in the 1930's. I can not find an exact copyright date for this book, called The United States: A History by John Clark Ridpath, but I believe it was printed around 1890. If anyone knows how rare this book is, or if it is worth much, please let me know.