"There are numerous time-honored stories which have become so incorporated into the literature and thought of our race that a knowledge of them is an indispensable part of one's education. These stories are of several different classes. To one class belong the popular fairy tales which have delighted untold generations of children, and will continue to delight them to the end of time. To another class belong the limited number of fables that have come down to us through many channels from hoar antiquity. To a third belong the charming stories of olden times that are derived from the literatures of ancient peoples, such as the Greeks and the Hebrews. A fourth class includes the half-legendary tales of a distinctly later origin, which have for their subjects certain romantic episodes in the lives of well-known heroes and famous men, or in the history of a people."