A line-by-line, material and textual case shows Codex Sinaiticus is a genuine fourth-century Bible, not a nineteenth-century forgery or Simonides hoax.
EUSEBIAN CANONS: the System of Dividing the Four Gospels
Eusebian canons, Eusebian sections or Eusebian apparatus, also known as Ammonian sections, are the system of dividing the four Gospels used between late Antiquity and the Middle Ages. The divisions into chapters and verses used in modern texts date only from the 13th and 16th centuries, respectively.

