Why, then, is so small a number of Cain's generations registered, if it was proper to trace them to the deluge, and if there was no such delay of the date of puberty as to preclude the hope of offspring for a hundred or more years? For if the author of this book had not in view some one to whom he might rigidly trace the series of generations, as he designed in those which sprang from Seth's seed to descend to Noah, and thence to start again by a rigid order, what need was there of omitting the first-born sons for the sake of descending to Lamech, in whose sons that line terminates,--that is to say, in the eighth generation from Adam, or the seventh from Cain,--as if from this point he had wished to pass on to another series, by which he might reach either the Israelitish people, among whom the earthly Jerusalem presented a prophetic figure of the heavenly city, or to Jesus Christ, "according to the flesh, who is over all, God blessed for ever,"(4)the Maker and Ruler of the heavenly city? What, Isay, was the need of this, seeing that the whole of Cain's posterity were destroyed in the deluge? From this it is manifest that they are the first-born sons who are registered in this genealogy.
Why, then, are there so few of them? Their numbers in the period before the deluge must have been greater, if the date of puberty bore no proportion to their longevity, and they had children before they were a hundred years old.For supposing they were on an average thirty years old when they began to beget children, then, as there are eight generations, including Adam and Lamech's children, 8 times 30 gives 240 years; did they then produce no more children in all the rest of the time before the deluge? With what intention, then, did he who wrote this record make no mention of subsequent generations? For from Adam to the deluge there are reckoned, according to our copies of Scripture, 2262 years,(5) and according to the Hebrew text, 1656 years.Supposing, then, the smaller number to be the true one, and subtracting from 1656 years 240, is it credible that during the remaining 1400 and odd years until the deluge the posterity of Cain begat no children?
But let any one who is moved by this call to mind that when I discussed the question, how it is credible that those primitive men could abstain for so many years from begetting children, two modes of solution were found,--either a puberty late in proportion to their longevity, or that the sons registered in the genealogies were not the first-born, but those through whom the author of the book intended to reach the point aimed at, as he intended to reach Noah by the generations of Seth.So that, if in the generations of Cain there occurs no one whom the writer could make it his object to reach by omitting the first-born and inserting those who would serve such a purpose, then we must have recourse to the supposition of late puberty, and say that only at some age beyond a hundred years they became capable of besetting children, so that the order of the generations ran through the first-born, and filled up even the whole period before the deluge, long though it was.It is, however, possible that, for some more secret reason which escapes me, this city, which we say is earthly, is exhibited in all its generations down to Lamech and his sons, and that then the writer withholds from recording the rest which may have existed before the deluge.And without supposing so late a puberty in these men, there might be another reason for tracing the generations by sons who were not first-born, viz., that the same city which Cain built, and named after his son Enoch, may have had a widely extended dominion and many kings, not reigning simultaneously, but successively, the reigning king besetting always his successor.Cain himself would be the first of these kings; his son Enoch, in whose name the city in which he reigned was built, would be the second; the third Irad, whom Enoch begat; the fourth Mehujael, whom Irad begat; the fifth Methusael, whom Mehujael begat;the sixth Lamech, whom Methusael begat, and who is the seventh from Adam through Cain.But it was not necessary that the first-born should succeed their fathers in the kingdom, but those would succeed who were recommended by the possession of some virtue useful to the earthly city, or who were chosen by lot, or the son who was best liked by his father would succeed by a kind of hereditary right to the throne.And the deluge may have happened during the lifetime and reign of Lamech, and may have destroyed him along with all other men, save those who were in the ark.For we cannot be surprised that, during so long a period from Adam to the deluge, and with the ages of individuals varying as they did, there should not be an equal number of generations in both lines, but seven in Cain's, and ten in Seth's;for as I have already said, Lamech is the seventh from Adam, Noah the tenth; and in Lamech's case not one son only is registered, as in the former instances, but more, because it was uncertain which of them would have succeeded when he died, if there had intervened any time to reign between his death and the deluge.