Quotation from: The Gods of Mars

Written by: Edgar Rice Burroughs

They were popularly supposed to inhabit the lesser moon, from which
they descended upon Barsoom at long intervals. Where they visited
they wrought the most horrible atrocities, and when they left
carried away with them firearms and ammunition, and young girls
as prisoners. These latter, the rumour had it, they sacrificed
to some terrible god in an orgy which ended in the eating of their
victims.