Pilgrims of Christ now provides free public domain copies of the Baltimore Catechism No. 1, the Confessions of St. Augustine Trans. EB Pusey, and Summa Theologica: Part 1.
It’s the fraternity’s hope with time to provide a more detailed break down of each particular texts for reference to specific chapters and parts. Of course, until that time, the text is easily referenced using your “find” feature on your computer.
For further edification, please feel free to read my post On the Influence of St. Augustine and check out my videos where I give small lectures on main topics found in each lesson in the Baltimore Catechism.