Simplify the following text for a Grade 9 native English-speaking person.
Original: The first English-born editor-in-chief was Thomas Spencer Baynes , who oversaw the production of the 9th edition ; dubbed the `` Scholar 's Edition '' , the 9th is the most scholarly Britannica .
Simplified: The first English chief editor was Thomas Spencer Baynes , who led the making of the famous 9th edition , which is also called the `` Scholar 's Edition '' . The 9th edition is considered to be the Britannica most meant for students ever written .