The Romance of Golden Star by George Griffith

Francis Hartness and I came last out of the passage, and I asked him to lead the soldiers out of the hollow and across the plain to the wall of the Sacsahuaman, where I would join them, and as soon as they had gone out of the hollow and were lost to sight I went to the hole among the bushes where the hidden stone was and released the chain and let the water flow back into its old place, till the entrance to the Hall of Gold was only the same dark, stagnant pool that any wanderer might find at the bottom of the cloven stairway.

Then I strewed the earth over the hole, and piled the stones and brushwood round and over it as before, and went away to join the others. I found them standing in a group in one of the angles of the great fortress, and there I spoke to the soldiers again, and told them how much depended, both for themselves and for the country, on their fidelity, promising them peace and prosperity and freedom if they were faithful, and a speedy death if they betrayed me.