British Library MS. Sloane 3682. Paper. Quarto. 285 folios. 16th Century. An alchymical treatise by Petrus Bonus Lombardus entitled, 'Introductio in divinam chemiae artem integra', translated into English by Roger Howes for Mr Gawyn Smith, Master of her Majesty's Engines, in 1590. ff.1-285. Printed in Latin, in 4 to. Bas. 1572.