[Footnote 19: Yet in modern times, the Tyber has sometimes
damaged the city, and in the years 1530, 1557, 1598, the
annals of Muratori record three mischievous and memorable
inundations, (tom. xiv. p. 268, 429, tom. xv. p. 99, &c.)
Note: The level of the Tyber was at one time supposed to be
considerably raised: recent investigations seem to be
conclusive against this supposition. See a brief, but
satisfactory statement of the question in Bunsen and
Platner, Roms Beschreibung. vol. i. p. 29. - M.]