Quotation from: The Gods of Mars

Written by: Edgar Rice Burroughs

"Above us," she said, "is a doorway which opens on to the inner
gardens. I have brought you thus far. From here on for four miles
to the outer ramparts our way will be beset by countless dangers.
Guards patrol the courts, the temples, the gardens. Every inch of
the ramparts themselves is beneath the eye of a sentry."