Notice the date on Athanasius’ letter: 367. The North African Councils were 393 (Hippo), 397 and 419 (Carthage). Then there are the Council of Rome (382), Rufinus of Aquileia (c. 400), Pope Innocent I (405). From this point on there was universal acceptance of the Deuterocanonical books in the West. They would subsequently also be accepted in the East. There were always less controversy about them in the West than in the East. The occasional questioning from isolated theologians does not change this fact. Only with Martin Luther in the 16th century was there a serious rejection of the Deuterocanonical books. History does not support the Protestant version of the development of the Canon.
The claim that the Council of Rome (382) approved an infallible canon is contrary to Roman Catholic statements which point to Trent, and depends upon the Decretum Gelasianum, the authority of which is disputed (among RC's themselves), based upon evidence that it was pseudepigraphical, being a sixth century compilation put together in northern Italy or southern France at the beginning of the 6th cent. In addition the Council of Rome found many opponents in Africa.” More: http://www.tertullian.org/articles/burkitt_gelasianum.htm
(405). From this point on there was universal acceptance of the Deuterocanonical books in the West.
Which is more propaganda that is contrary to even RC sources such as the The Catholic Encyclopedia. See above, by the grace of God.
This belies the FACT there was NOT a UNANIMOUS decision as to which 'canon' was 'accepted'.
Then; as today; the most men's votes on a matter carries the day.