Paragraph 16, Line 24 Letters To Friends: Ad Familiares IV by Cicero
Paragraph 10, Line 15 Letters To Friends: Ad Familiares VII by Cicero
Paragraph 19, Line 27 Letters To His Brother: Ad Quintum Fratrem I by Cicero
Paragraph 8, Line 9 Quaestiones Naturales I by Seneca
Section Praefatio, Paragraph 1, Line 10 Quaestiones Naturales II by Seneca
Paragraph 5, Line 5