Lincoln's birthday

[Eva Elisabeth]

This book says the pages with the vital information written by Lincoln were torn out of the Bible by Dennis Hanks with copies being made by John D. Johnston and a grandson of Lincoln's stepmother.

https://books.google.com/books?id=wYmvvE...g=PA26&dq=

Although looking at the entries, it looks like John D. Johnston is where Lincoln copied most or all of the information in the Bible from.

My understanding is that it was John D. who copied, not v.v.:
   
How/why should John D. have been the source of Lincoln's date of birth? Probably the bible entry was a joint venture, each adding his personal family data, Lincoln on the Lincolns, and John D. J. on the Johnstons.

Ed Steers (who wrote the book you linked to) is a forum member - maybe he could kindly comment?