It was arranged that Bennet Langton, a Lincolnshire landowner and mutual acquaintance of Wilberforce and Clarkson, would organize a dinner party in order to ask Wilberforce formally to lead the parliamentary campaign. The dinner took place on 13 March 1787; other guests included Charles Middleton, Sir Joshua Reynolds, William Windham MP, James Boswell and Isaac Hawkins Browne MP. By the end of the evening, Wilberforce had agreed in general terms that he would bring forward the abolition of the slave trade in Parliament, "provided that no person more proper could be found".