Thomas Bailey Saunders,
Dictionary of National Biography…
(1892)
“ After a visit to Swansea, where his eldest son was born, Knowles appeared on the boards at Belfast. There he wrote, on the basis of an earlier work of the same name, a play entitled ‘Brian Boroihme, or the Maid of Erin,’ 1811, which proved very popular. But these efforts produced a very small income, and Knowles was driven to seek a living by teaching. He opened a school of his own at Belfast, and composed for his pupils a series of extracts for declamation under the title of ‘The Elocutionist,’ which ran through many editions. ”
