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 reason to doubt the truth of the man's tale; he no doubt got, as he says, the rather uncommon salt you prescribed from the wholesale chemist's; and it has probably remained on his shelf for twenty years, or perhaps longer. Here what we call chance and coincidence begins to work; during all these years the salt in the bottle was exposed to certain recurring variations of temperature, variations probably ranging from 40° to 80°. And, as it happens, such changes, recurring year after year at irregular intervals, and with varying degrees of intensity and duration, have constituted a process, and a process so complicated and so delicate, that I question whether modern scientific apparatus directed with the utmost precision could produce the same result. The white powder you sent me is something very different from the drug you prescribed; it is the powder from which the wine of the Sabbath, the Vinum Sabbati was prepared. No doubt you have read of the Witches' Sabbath, and have laughed at the tales which terrified our ancestors; the black cats, and the broomsticks, and dooms pronounced against some old woman's cow. Since I have known the truth I have often reflected that it is on the whole a happy thing that such burlesque as this is believed, for it serves to conceal much that it is better should not be known generally. However, if you care to read the appendix to Payne Knight's monograph, you will find that the true Sabbath was something very different, though the writer has very nicely refrained from printing all he knew. The secrets of the true Sabbath were the secrets of remote times surviving into the Middle Ages, secrets