If the book of Genesis is correct, and if I've done my calculations correctly, Madeleine L'Engle misrepresented the pre-Flood state of the world in her book Many Waters.
It wasn't Noah's father Lamech who lived until just before the Flood, but his grandfather Methuselah. Genesis doesn't say clearly whether Methuselah died before the Flood, or in it, but I believe L'Engle was probably correct in describing Noah as having the support of a Godly elder during the century he spent building the Ark, in a world where all other families were wicked.
Furthermore, according to Genesis Adam lived well into Methuselah's lifetime.
At some earlier point, I looked into the post-Flood genealogies and found that Abraham was a contemporary of some from the first generations after Noah and his family got off the Ark.
I also noticed in Mark that the centurion who saw Jesus die, and who declared that he was the Son of God, shortly after that reported back to Pilate in person that Jesus was dead.
A boomer apologizes, albeit without much clarity.
"It is not meet to take the children's bread, and to cast it to dogs," Jesus said; Matthew 15:26.
I recently understood that I am spending my life in rebuilding spiritual and practical foundations that had been foolishly undermined by previous generations.
Several months ago I was reading a nonfiction book by Christian author Paul Tournier, and made it about three-quarters of the way through before being drawn away to other things.
When I picked it up this last week and finished reading it, I found references to about a dozen Bible passages that had come up in my daily Bible readings in the interim, mostly obscure Old Testament personages with a variety of afflictions; Tournier was a Swiss doctor famous for connecting his Christianity with his medical practice.
I also read a Christian fiction book this last week: Deadline, by Randy Alcorn. One day, what I read in the book mirrored my morning Bible reading on that same day.
"A work of creation was three-fold, an earthly trinity to match the heavenly; the Creative Idea, timeless and passionate, which is the image of the Father; the Creative Energy, begotten of the idea and working in time, which is the image of the Word; the Creative Power, the meaning of the work and its response in the individual soul, which is the image of the indwelling Spirit."
-- P. D. James, summarizing Dorothy L. Sayers' description