Much may be learned from the monumental inscriptions of all nations. The first epitaph is supposed to be traced back to the year of the world 2700, when the scholars of Linus, the Theban poet, bewailed their master in verses which were inscribed upon his tomb. From that day to this, wherever there have been letters, there have been epitaphs; and, where letters have been wanting, there have been symbols. Mysterious symbolic arrangements are traced in the monumental mounds in the interior of the American continent, where a race of whom we know nothing else flourished before the Red man opened his eyes upon the light. One common rule, drawn from a universal sentiment, has presided at the framing of all epitaphs for some thousands of years. "De mortuis nil nisi bonum" is the universal agreement of mourners.[G] It follows that epitaphs must everywhere indicate what is there considered good. The observer must give his attention to this. Among a people "whose merchants are princes," the praise of the departed will be in a different strain from that which will be found among a warlike nation, or a community of agriculturists. Here one may find monumental homage to public spirit, in the form of active citizenship; there to domestic virtue as the highest honour. The glory of eminent station, of ancient family, of warlike deeds, and of courtly privileges may be conspicuously exhibited in one district; while in another the dead are honoured in proportion to their contempt of human greatness, even when won by achievements; to their having lived with a sole regard "to things unseen and eternal." An inscription which breathes the pride of a noble family in telling that "all the sons were brave, and all the daughters chaste," presents a summary of the morals of the age and class to which it belongs. It tells that the supreme honour of men was to be brave, and of women to be chaste; excluding the supposition of each sharing the virtue of the other: whereas, when courage and purity shall be understood in their full signification, it will have become essential to the honour of a noble family that all the sons should be also pure, and all the daughters brave. Then bravery will signify moral rather than physical courage, and purity of mind will be considered no attribute of sex.