J. H. Thorpe, Dictionary of National Biography… (1886)
“ Cowper has extolled his faithful friend in both prose and verse. At Olney vicarage Bull met Mrs. Wilberforce, aunt to the celebrated statesman, and sister to the benevolent John Thornton. She invited Bull to visit her in London, and there she introduced him to her brother. About this time the evangelicals projected a new academy ‘to prepare young men for the ministry.’ Mr. Newton drew up a plan, and a proposal was made for Bull to superintend the arrangements, and thus turn Bull's school into an academy. In 1783 the academy commenced with two students ”
