Mr. Champollion continued to reside at Grenoble, where he had some employment in the public library, till the beginning of 1821. I had not a convenient opportunity of sending him any of my later papers; and it was not till after he had left Grenoble, that he read the Article EGYPT of the Supplement of the Encyclopaedia, into which their contents were condensed. He had been devoting himself, in the mean time, to the uninterrupted study of the enchorial inscription, and he appears to have discovered, before he came to Paris, the original identity of these characters with the imperfect imitations of the more distinct hieroglyphics. Whether he made this discovery before I had printed my letters in the Museum Criticum, I have no means of ascertaining: I have never asked him the question, nor is it of much consequence, either to the world at large or to ourselves. It may not be strictly just, to say, that a man has no right to claim any discovery as his own, till he has printed and published it: but the rule is at least a very useful one. It is always easy to publish such an account of a discovery, as to establish the right of originality, without affording much facility to the pursuits of a competitor: although it is generally true, that not only honesty, but even liberality, is the best policy. Passing by, however, what I had already done, by far the most important to me was what I had not done, and there was enough of this to satisfy me, that Mr. Champollion was at least capable of doing many things, with respect to which his claim of actual priority might appear more than doubtful. He had found, in the first place, among the multitude of Egyptian papyri, which he had taken the trouble to copy at length, with the permission of their various possessors, one in particular, of which a series of the chapters were pretty obviously numbered in the enchorial character, the series extending, with a few interruptions, from 1 to 20. He had already applied this discovery to the illustration of some parts of the pillar of Rosetta: and I have since derived at least equal advantage from it, in the examination of the enchorial papyrus of Casati. He had also discovered a fragment of a pillar formerly in the possession of the Duc de Choiseul, which exhibited the character for a month, followed by several various groups, together with different numbers, evidently indicative of days; so that to the names of the three months, which I had discovered, he was enabled to add at least four more, though without completely ascertaining to which of the months these new symbols belonged.