This is more especially true of the literary epics of ancient Babylonia. They seem to have been numerous; at all events fragments of a good many have been saved for us out of the wreckage of the past. But they belong for the most part to the same period, the age of national revival which began with the reign of Khammurabi, and continued for several centuries after his death. It is possible that Sin-liqi-unnini, the author of the great Epic of Gilgames, was a contemporary of Abraham; the story of Adapa, the first man, was already in existence, and had become a standard classic, when the Tel el-Amarna letters were written in the fifteenth century B.C. Behind all these poems lay a long-preceding period in which the myths and legends they embody had taken shape and formed the subject of numberless literary works. The Epic of Gilgames is, for instance, but the final stage in the literary development of the tales and myths of which it is composed; older poems, or parts of poems, have been incorporated into it, and the elements of which it consists are multiform and of various origin. The story of the Deluge, which constitutes the eleventh book, has been foisted into it by an almost violent artifice, and represents a combination of more than one of its many versions which were in circulation in Babylonia. When the early libraries of the country have been explored, we shall know better than we do now how far the story in the form we have of it in the Epic is original, and how far the author has freely borrowed from his predecessors, using their language or combining their work.