To the causes to which he attributes this strange wasting away . . . I think infecundity, produced by the infidelity of the women to their husbands in the early times of the colony, may be safely added . . . Robinson always enumerates the sexes of the individuals he took; . . . and as a general thing, found scarcely any children amongst them; . . . adultness was found to outweigh infancy everywhere in a remarkable degree . . ."