Edgar Rice Burroughs,
The Gods of Mars
“ Phaidor's eyes were wide in amazement. "The Temple of Issus," she whispered, half to herself. Xodar watched us with his grim smile, partly of amusement and partly malicious gloating. The gardens swarmed with brilliantly trapped black men and women. Among them moved red and white females serving their every want. The places of the outer world and the temples of the therns had been robbed of their princesses and goddesses that the blacks might have their slaves. ”
