Quotation from: The Chessmen of Mars

Written by: Edgar Rice Burroughs

"There is no way," replied the old man.

For some time they stood upon the roof beneath the brilliant
stars and hurtling moons of dying Mars, laying their plans
against the time that Tara of Helium should be brought from the
high tower to the throne room of O-Tar. It was then, and then
alone, argued I-Gos, that any hope of rescuing her might be
entertained. Just how far he might trust the other Gahan did not
know, and so he kept to himself the knowledge of the plan that he
had forwarded to Floran and Val Dor by Ghek, but he assured the
ancient taxidermist that if he were sincere in his oft-repeated
declaration that O-Tar should be denounced and superseded he
would have his opportunity on the night that the jeddak sought to
wed the Heliumetic princess.