The next rank is accorded to the tissue known as “byssus,”[850] an article which is held in the very highest estimation by females, and is produced in the vicinity of Elis, in Achaia.[851] I find it stated by some writers that a scruple of this sold formerly at four denarii, the same rate, in fact, as gold. The downy nap of linen, and more particularly that taken from the sails of sea-going ships, is very extensively employed for medicinal purposes, and the ashes of it have the same virtues as spodium.[852] Among the poppies, too,[853] there is a variety which imparts a remarkable degree of whiteness to fabrics made of linen. CHAP. 5.—AT WHAT PERIOD LINEN WAS FIRST DYED. Attempts, too, have even been made to dye linen, and to make it assume the frivolous colours[854] of our cloths. This was first done in the fleet of Alexander the Great, while sailing upon the river Indus; for, upon one occasion, during a battle that was being fought, his generals and captains distinguished their vessels by the various tints of their sails, and astounded the people on the shores by giving their many colours to the breeze, as it impelled them on. It was with sails of purple, too, that Cleopatra accompanied M. Antonius to the battle of Actium, and it was by their aid that she took to flight: such being the distinguishing mark of the royal ship. CHAP. 6.—AT WHAT PERIOD COLOURED AWNINGS WERE FIRST EMPLOYED IN THE THEATRES. In more recent[855] times linens alone have been employed for the purpose of affording shade in our theatres; Q. Catulus having been the first who applied them to this use, on the occasion of the dedication by him of the Capitol. At a later period, Lentulus Spinther, it is said, was the first to spread awnings of fine linen[856] over the theatre, at the celebration of the Games in honour of Apollo. After this, Cæsar, when Dictator, covered with a linen awning the whole of the Roman Forum, as well as the Sacred Way, from his own house as far as the ascent to the Capitol, a sight, it is said, more wonderful even than the show of gladiators which he then exhibited. At a still later period, and upon the occasion of no public games, Marcellus, the son of Octavia, sister of Augustus, during his ædileship, and in the eleventh consulship of his uncle, on the * * * day before the calends of August, covered in the Forum with awnings, his object being to consult the health of those assembled there for the purposes of litigation—a vast change, indeed, from the manners prevalent in the days of Cato the Censor, who expressed a wish that the Forum was paved with nothing else but sharp pointed stones.