Prehistoric Boys Small 248×320 Medium 496×640 Large 794×1024 Download Tiff Original 1860×2400 | (1.8 MB) Description Two boys from prehistoric times watch from a tree as a bull charges a bear. Keywords bear, boys, bull, cavemen, forest, prehistoric man, tree climbing, wild Galleries Groups of Boys Source: Lewis, William D. The Silent Readers (Philadelphia, PA: The John C. Winston Company, 1920)