In the Bulletin de Correspondance Hellénique for 1881 (vol. v. pp. 216 foll.) MM. Am. Hauvette-Besnault and Marcel Dubois published a number of inscriptions from Cos, among which are two fragments of a curious sacrificial calendar. These fragments they describe as existing in the house of M. Dim. Platanistis. One of the marbles is broken at the top and the left side, and is apparently inscribed on one surface only. Fifteen lines of the inscription can be fairly well deciphered. I will call this document HBD 1. The other marble was inscribed on both sides; but only the endings of some nineteen lines on the one side, and the beginnings of as many lines on the other, now remain: I shall call this document HBD 2a, b.Mr. W. R. Paton, who has repeatedly visited Cos, has not only sent me corrections of some of the readings in HBD 1, but he has also had the good fortune to discover two other large portions of the same interesting calendar. Of these he has very kindly sent me copies, with a view to the publication of the inscription in this Journal. I propose to cite Mr. Paton's fragments as P1 and P2.The marble P1 is on the floor in front of the altar of a very old church, and has been much worn by the feet of worshippers; so that in some places all trace of letters has disappeared