Irving Crump (1887 - 1979)

American author and editor of Boys' Life for 25 years, 1915-1923 and 1935-?1952. He is known almost exclusively for his sequence of Young Adult Prehistoric SF novels, set in Europe "500,000 years ago" and featuring the resourceful pre-Neanderthal Og, who introduces fire to his tribe, fights off various dangerous beasts including giant tapirs, mammoths, mastodons and snake (though not, correctly, the by then extinct Dinosaurs) and comports himself with commendable dignity throughout.