Condensed Biblical Cyclopedia
Everything dates from the creation of Adam. Beyond him all is wrapped in dark and impenetrable mystery. In order to determine the Length of time from Adam's creation to the flood we have only to add The ages of the antediluvian patriarchs--Adam, Seth, Enos, Cainan, Mahalaleel, Jared, Enoch, Methuselah, Lamech, Noah--at the births of Their first sons, and add to this the age of Shem at the flood, and we Find that it was 1656 years (Genesis 5:3-32; Genesis 7:6 ).
These files are public domain and are a derivative of an electronic edition that is available from the Online-Bible.
Johnson, Ashley S. Entry for 'Antediluvian Chronology'. Condensed Biblical Cyclopedia. https://www.studylight.org/encyclopedias/eng/cbc/a/antediluvian-chronology.html. 1896.