A Catechism of Christian Doctrine aka The Baltimore Catechism (1885), was revised at least twice and added to numerous times. This work consists of the most modernized version, the New Saint Joseph Baltimore Catechism (1962) 2nd volume, by Fr. Bennet Kelley. - No.2 is the main edition, for 6th through 9th graders. - Please endeavor to keep all these variations separated.