The Roman History · Amm. 22.15.12

Among these are two of especial celebrity, Meroe and Delta. The latter derives its name from its triangular form like the Greek letter; but when the sun begins to pass through the sign of Cancer, the river keeps increasing till it passes into Libra; and then, after flowing at a great height for one hundred days, it falls again, and its waters being diminished it exhibits, in a state fit for riding on, fields which just before could only be passed over in boats.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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