Paragraph 1, Line 16 Philosophia: Brutus by Cicero
Paragraph 1, Line 31 Tusculan Disputations II by Cicero
Paragraph 2, Line 2 De Natura Deorum III by Cicero
Paragraph 1, Line 4 Ab Urbe Condita Libri: Preface by Livy
Paragraph 2, Line 2