The tablet represented in Plate 51, is remarkable for the confirmation which its date affords of the accuracy of our chronology of the Ptolemies. It has no _pure_ hieroglyphics. It begins immediately with “_The year 19, otherwise 4, of Cleopatra [Neotera], and Ptolemy surnamed Caesar_: that is, the year 34 B. C.; and the same date is repeated in a form somewhat more distinct, four times, in the 10th, 11th, 12th, and 15th lines. In the last it is followed by _the Queen gave to the Priests and High Priests_ . . then _Ptolemy [Auletes?] . . Queen Cleopatra and King Ptolemy surnamed Caesar_. It has before been observed, that the word _surnamed_, as it occurs in these tablets, and in Mr. Grey’s manuscripts, comprehends the characters which answer to the NEO of Mr. Champollion’s NEOCAESARIS. The beginning of the group occurs elsewhere in the sense of _called_, and can scarcely be read “ETO,” whether we consider the sacred or the enchorial characters; nor do we find any thing nearer to this in Coptic than ETE, meaning “_that is_,” while the characters are more like TENE. Such are the uncertainties which continually beset us in the application of the best established alphabetical characters even to words of which we know the sounds: to investigate the unknown by them is at present almost hopeless. There are two tablets, from the caverns at Sacchara, about to appear in Plates 70 to 74 of the Hieroglyphics, which Mr. Salt sent over with particular interest, as being likely to contain some useful materials for the comparison of the different kinds of characters with each other. In this point of view, however, his well-directed zeal has failed of its object: for the sacred characters relate almost entirely to the gods and priests of the temple, while the enchorial inscriptions below them contain dates and records of the successive donations made to those temples. And this seems to be equally true of the generality of double inscriptions, which are scarcely ever identical in this sense, although they may greatly tend to illustrate each other.