The letter of your anonymous correspondent “A. B. C.,” in your issue for Dec. 16, hardly seems to need a reply, in as much as he has added nothing whatever to the solution of the question raised in mine, whether any writings of Sir Thomas Millington are in existence which confirm the alleged discovery by him of the sexuality of plants. From the silence of your correspondent on this point, as well as of the two writers referred to in my letter, I infer that no such writings are, at all events, readily accessible. There are, however, some statements by your correspondent which cannot be allowed to pass uncorrected.