This precious archaeological monument is an edict of Diocletian, published in the year 303 of our era, and fixing the price of labour and of food in the Roman empire. The first part of this edict was found by Mr. William Hanks, written upon a table of stone, which he discovered at Stratonice, now called Eskihissar in Asia Minor. The second part, which was in the possession of a traveller lately returned from the Levant, has been, brought from Rome to London by M. de Vescovali, and Colonel Leake intends to publish a literal translation of it. This agreement of so many persons of respectable character, and known talents, excludes all doubts respecting the authenticity of the monument. The imperial edict of Diocletian is composed of more than twenty-four articles. It is quite distinct from that delivered the preceding year for taxing the price of corn in the eastern provinces, and it contained no law upon the value of corn. It fixed for all the articles which it enumerated a maximum, which was the price in times of scarcity. For all the established prices it makes use of the _Roman Denarii_; and it applies them to the _sextarius_ for liquids, and to the _Roman pound_ for the things sold by weight. Before the Augustan age, the _denarius_ was equal to eighteen sous of our money; but it diminished gradually in value, and under Diocletian its value was not above nine sous of French money, and 45 centimes. The Roman pound was equivalent to 12 ounces, and the _sextarius_ which was the sixth part of a conge, came near to the old Paris chopin, or half a litre. Proceeding on these data, M. Moreau de Jonnes has formed a table, showing, 1. the maximum in Roman measures, the same as the established imperial edict; and 2. the mean price of objects _formed from_ half the maximum, and reduced into French measures. The following is the table drawn up by M. Moreau de Jonnes. The slightest inspection of it will enable us to appreciate the importance of this archaeological discovery, for no monument of antiquity has furnished so long a series of numerical terms, of statistical data, and positive testimony of the civil life and domestic economy of the Greeks and Romans:-- I.--PRICE OF LABOUR. Maximum Mean Price in Roman in English Money. Money.