At the suggestion of the editor of the Medical Library {122} and Historical Journal, I answered these assertions of Dr. Cruikshank, pointing out that the Papal document which he mentioned had no such purport as he declared, and that the history of chemistry or alchemy presented no such break as his assertions would demand. Dr. Cruikshank immediately appealed by letter to his authority on the subject, whose words, in the History of the Warfare of Theology with Science in Christendom, though I did not realize it at the time, he had repeated almost literally. In his chapter on From Magic to Chemistry and Physics, Dr. Andrew D. White says: "In 1317, Pope John XXII. issued his bull _Spondent pariter,_ levelled at the alchemists, but really dealing a terrible blow at the beginning of chemical science. He therefore called on all rulers, secular and ecclesiastical, to hunt down the miscreants who thus afflicted the faithful, and he especially increased the power of inquisitors in various parts of Europe for this purpose." It will be seen that, as I have said, Dr. Cruikshank's words are almost a verbatim quotation from this paragraph. It is true that he has strengthened the expressions quite a little and added some trimmings of his own, still I suppose his expressions could be justified if those of President White had a foundation in fact. A little comparison of the two sets of phrases will show how a history lie grows as it passes from pen to pen. _Crescit eundo_--like rumor, it increases in size as it goes. In defense of this passage in the History of the Warfare of Science with Theology in Christendom, Dr. White wrote a letter of reply to Dr. Cruikshank, which was incorporated into Dr. Cruikshank's response to my article in the Medical Library and Historical Journal. I presume that this was done with Dr. White's permission. {123} In this letter he admitted that Pope John's decretal had no such significance as he originally claimed for it, but he still maintained his previous opinion, that this decretal, like Boniface's bull for anatomy, had actually prevented, or at least greatly hampered the study of chemistry. To this I replied with a brief story of chemistry in the fourteenth century, and though that article was published more than a year ago, no admission has been made and nothing further has been published on the subject. The material of the reply to Dr. White, to which as yet there has been no answer, is comprised in this chapter.