Many flood legends have survived from all parts of the world. Nearly all of them are variations of the theme in the Biblical account; however, in none of them is there a purity of this theme. They all diverge from the Biblical account in one or more aspects. Most of the legends fall into one of two general classifications. In one of these a favored family is saved, and in the other the survivors vary in number and relationship. Four of the aspects central to the Biblical account occur in varying combinations throughout the legends in both classifications. Because of the varying combinations, the individual legends cannot be categorized as one specific type or another. However, a statistical analysis indicates the purity of the Biblical account and reveals evidence of subsequent upheavals having corrupted in varying degrees all other accounts.