"The history of English grammar is shrouded in mystery. It’s generally thought to begin in the late sixteenth century, with William Bullokar’s Pamphlet for Grammar (1586) — but where did Bullokar’s inspiration come from? In these times, the structure and rules of English grammar were constructed and contrasted with the Latin. Bullokar wrote his treatise with the intention of proving that English was bound by just as many rules as Latin, and for this, he borrowed heavily from a pre-existing text: William Lily’s Latin Grammar.
No other textbook has been used for such a long period of time in English schools as Lily’s Latin Grammar. It was prescribed by Henry VIII in 1540 as the authorized an obligatory text, to be used in all schools across the country..."
Image Credit: “Latin Letters” by Tfioreze. CC BY-SA 3.0 via Wikimedia Commons.