Pee-Wee Harris on the Trail by Percy Keese Fitzhugh (1876 - 1950)

In this, the second Pee-Wee Harris adventure, we follow young Walter, B.S.A (Boy of Superior Appetite or Boy Scout of America, take your pick) as he encounters robbers, proves himself a good friend and follows a trail of footprints into trouble. - Summary by Lynne Thompson