Certamen epistolare : or, the letter-combate / managed by Peter Heylyn with Mr. Baxter, Dr. Barnard, Mr. Hickman and J. Harrington. - Heylyn, Peter, 1600-1662 (Printed by J.M. for H. Twyford, T. Dring, and J. Place, and are to be sold at their Shops, in Vine-Court in the Middle Temple, at the George near S. Dunstons Church in Fleet-street, and at Furnivals-Inne Gate, in Holburn, 1659)