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From what cause the rite of Baptisme first proceeded,
is not           formally in the Scripture; but it may be probably
thought to be an imitation of the law of Moses, concerning Leprousie;
wherein the Leprous man was commanded to be kept out of the campe of
Israel for a certain time; after which time being judged by the Priest
to be clean, hee was admitted into the campe after a solemne Washing.