Praxis Grammatica - Preparation for Summer Camp

The Preface of the 17th century Praxis Grammatica explains how it is designed to teach and occasionally entertain. My selection for today tells you about a time before letter-writing became a lost art:

[ 208 ] Vos docti estis epistolam perscribere ad patrem vestrum.
[Anglice (English Translation)]

• How to Pronounce Latin
• Latin Personal Pronouns
• Latin Verb Tenses

• Terms for Relationships in the Roman Family

Do you have a different interpretation? Please post in the comments about this bit of wisdom from Praxis Grammatica.