The Gray Shadow by Roy J. Snell
A Mystery Story For Boys
Famous Classic Thrilling Story
Roy Judson Snell (November 20, 1878 – September 21, 1959) was an American writer of fiction mainly for young readers.
Snell wrote several books, all in the genre of juvenile fiction. While he mostly concentrated on stories for boys there was at least one series of mysteries for girls. He also wrote under the nom de plumes of David O’Hara, James Craig and Joseph Marino.