Attack Dog Training Demonstration Photos. Illustration Bureau, ca. early 20th century. Series of three silver gelatin photographs showing a demonstration of a trained attack dog. Images show the dog lunging toward a man in protective gear as he attempts to flee, scales a wall, and lays on the ground. Stamped ?Illustration Bureau" and one inscribed verso. Each 6 ? x 4 ?". Curling and toning, else very good.