Living in mountain caves, or rude huts, hunting the forest animals with crudely made spears and bows, they lost all vestige of the high knowledge and mastery over nature possessed by their forefathers. They understood no longer the machines that rusted in the rotting cities. Through a sort of atavistic animism, they began to worship the elements that their fathers had subdued and controlled. At first they tried to assail the laboratory, impelled by a savage lust for loot and bloodshed; but, driven back with dire loss by the zone of deadly force, they soon abandoned their siege. In time they came to regard the Custodians as actual demigods, wielding mysterious, awful powers, and working incomprehensible miracles. Few of them now dared to approach the environs of the building, or to follow the wild boar and deer into the wooded valleys about it.

For many years, none of the Custodians was seen by the hill-people. Sometimes, by day, there were strange vapors that mounted to the clouds above the observatory; and at night the lofty windows burned like hill-descended stars. The Custodians, it was thought, were forging their thunderbolts in godlike secrecy.