Salisbury Antiques Centre has dated this piece to the Georgian era.

Circa 1780.
“ From the estate of the late Reverend Anthony Derwent Coleridge (1916-68), by descent from his grandfather, the scholar Ernest Hartley Coleridge (1846-1920), grandson of the iconic English poet Samuel Taylor Coleridge (1772-1834).
Rose was a close friend and collaborator of Samuel’s. These hand written pages were found crumpled behind the secretaire drawer .“
Salisbury Antiques Centre has dated this piece to the Georgian era.
You can view the stock and full dealer information on the Salisbury Antiques Centre Profile Page