Note 508 — CANTO THE FOURTH[375]

{425} [When Byron visited Rome, and for long afterwards, the ruins of the Colosseum were clad with a multitude of shrubs and wild flowers. Books were written on the "Flora of the Coliseum," which were said to number 420 species. But, says Professor Lanciani, "These materials for a hortus siccus, so dear to the visitors of our ruins, were destroyed by Rosa in 1871, and the ruins scraped and shaven clean, it being feared by him that the action of roots would accelerate the disintegration of the great structure." If Byron had lived to witness these activities, he might have devoted a stanza to the "tender mercies" of this zealous archæologist.]