The Roman History · Amm. 20.3.8

But since she is always nearest to the earth as it revolves, and the most distant from the rest of the other stars, and sometimes exposes itself to the light which strikes it, and sometimes also is partially obscured by the intervention of the shade of night, which comes over it in the form of a cone; and then she is involved in thick darkness, when the sun, being surrounded by the centre of the lowest sphere, cannot illuminate her with his rays, because the mass of the earth is in the way; for opinions agree that the moon has no light of her own.

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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