Actually, Exodus states that manna fell each day except on the Sabbath. A double ration, uninfected by worms, fell instead on Friday. This seems awkward for Velikovsky’s hypothesis. How could the comet know? Indeed, this raises a general problem about Velikovsky’s historical method. Some quotations from his religious and historical sources are to be taken literally; others are to be dismissed as “local embellishments.” But what is the standard by which this decision is made? Surely such a standard must involve a criterion independent of our predispositions toward Velikovsky’s contentions.