 In the period 1779 to 1781, when there was a delegate conference, the movement gained a broad base.Supporters included John Baynes, Sir Robert Bernard, Newcome Cappe, John Fountayne, Sir James Grant, Thomas Brand Hollis, Sir James Innes-Ker, John Lee, Gamaliel Lloyd, George Montagu, 4th Duke of Manchester, John Smyth, Charles Stanhope, and William Johnson Temple.Herbert Butterfield argued that the Yorkshire Association was a quasi-revolutionary organisation and that "our “French Revolution” is in fact that of 1780—the revolution that we escaped".