Jack of the Pony Express by Frank V Webster 1915 Cupples and Leon Company.

Frank V. Webster was one of the early 20th century's most prolific authors of kids adventure books and Westerns, but that was due in large part to the fact that Frank V. Webster was actually many authors. Using Webster's name as a pseudonym, the Stratemeyer Syndicate published a number of books tailor made for boys, and they are still popular today.

This antique copy has a rough cover with spine damage as shown in the pictures.