Alnwick Castle MS. 621. 129 folios. Paper. 18th Century. 'The following MSS fell into my hands by accident in italian without either name or Title. I have translated it into English; and if it is of any value let those who come after me make use of it. I have been assured it is a real process and as it is clearly explained I have taken the trouble to copy it. 1783.' f1-129 [Treatise on Practiical Alchemy.]