illo nascitur amni...."

["How often have we seen the stage of the theatre descend and part
asunder, and from a chasm in the earth wild beasts emerge, and then
presently give birth to a grove of gilded trees, that put forth
blossoms of enamelled flowers. Nor yet of sylvan marvels alone had
we sight: I saw sea-calves fight with bears, and a deformed sort of
cattle, we might call sea-horses."--Calpurnius, Eclog., vii. 64.]

Sometimes they made a high mountain advance itself, covered with
fruit-trees and other leafy trees, sending down rivulets of water from
the top, as from the mouth of a fountain: otherwhiles, a great ship was
seen to come rolling in, which opened and divided of itself, and after
having disgorged from the hold four or five hundred beasts for fight,
closed again, and vanished without help. At other times, from the floor
of this place, they made spouts of perfumed water dart their streams
upward, and so high as to sprinkle all that infinite multitude. To
defend themselves from the injuries of the weather, they had that vast
place one while covered over with purple curtains of needlework, and
by-and-by with silk of one or another colour, which they drew off or
on in a moment, as they had a mind:

"Quamvis non modico caleant spectacula sole,
Vela reducuntur, cum venit Hermogenes."

["The curtains, though the sun should scorch the spectators, are
drawn in, when Hermogenes appears."-Martial, xii. 29, 15. M.
Tigellius Hermogenes, whom Horace and others have satirised. One
editor calls him "a noted thief," another: "He was a literary
amateur of no ability, who expressed his critical opinions with too
great a freedom to please the poets of his day." D.W.]

The network also that was set before the people to defend them from the
violence of these turned-out beasts was woven of gold:

"Auro quoque torts refulgent
Retia."

["The woven nets are refulgent with gold."
--Calpurnius, ubi supra.]

If there be anything excusable in such excesses as these, it is where the
novelty and invention create more wonder than the expense; even in these
vanities we discover how fertile those ages were in other kind of wits
than these of ours. It is with this sort of fertility, as with all other
products of nature: not that she there and then employed her utmost