Capitulum Secundum begins by introducing the familia Rōmāna, whom we first encountered in Lesson Four, along with the words vir (man), fēmina (woman), puer (boy) and puella (girl).
In the margin, the text helpfully demonstrates the plural forms of vir and puer, using the numbers ūnus and duo to help make the point. You will notice that -r nouns become plural with an -ī just like -us nouns do (Examples: Tiberis et Nīlus duo fluviī sunt. Unus et duo sunt numerī Romānī. Dāvus et Mēdus sunt virī. Quīntus et Mārcus parvī puerī sunt.)
Now read Capitulum Secundum, lines 1-7.
Satis est. See you soon.