The Roman History · Amm. 20.3.10

Again the moon is said to be new when she has the sun above her with a slight variation from the perpendicular, and then she appears very thin to mankind, even when leaving the sun she reaches the second sign. Then, when she has advanced further, and shines brilliantly with a sort of horned figure, she is said to be crescent shaped; but when she begins to be a long way distant from the sun, and reaches the fourth sign, she gets a greater light, the sun's rays being turned upon her, and then she is of the shape of a semicircle.

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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