Two clean birds, or, The cleaning of the leper : as it was unfolded in a sermon preached before the right honourable Ferdinando, Lord Fairfax, Generall of the northern forces, and the most of his army, on the fifth day of February, 1642 (being the Lords day, and by his honor appointed to bee kept as a fast upon speciall occasion) at Selbie, in the West Riding of the county of Yorke /