Thorogood - Oxford Grammar School

[Murgie]

My GGG Grandfather Thomas Baker born in Braintree, Essex was a Confectioner and lived in Horncastle, Lincolnshire.  He died in Horncastle in 1903.  In the newspaper cutting that I have of his obituary it states

The late Mr. Baker was born in 1814 at Braintree, Essex, where some of his family
previously owned the old coaching house known as the Horn Inn.  The  family
formerly occupied a higher position, one of them of the name of Thorogood,
having founded the Grammar School at Oxford.

I know that his mother was Mary Thorogood and she married Thomas Baker, a Pig Cutter on 5th April 1814 at St. Michaels Church, Braintree. 

What I would like to know is if anyone knows of the founding of Oxford Grammar school or if anyone is researching the Thorogood family who owned the Horn Inn.