John Calvin on the Genesis of Genesis

Genesis 5:1f mentions "the Book of the generations of Adam."  Carefully note once more: "the Book of the generations of Adam"!   Yes, "the Book" — "the Book" written either by God for Adam and his descendants, or written under in-Spir-ation from God by Adam for himself and his descendants.

Continues Calvin: "Did Noah, warned by a divine judgment so memorable, neglect to transmit it to posterity?"   No!   Genesis 7:11f and 10:1f.  

Indeed, it is almost inconceivable that the precise dates mentioned in the Flood Narrative could have been transmitted to posterity without a written  record!   Genesis 8:3-13.   And the same applies to the transmission of the lists of the precise ages attained by both the antediluvian and the postdiluvian patriarchs.   Genesis 5:1-32 & 11:10-32.