He then discovered a new source of funds in the execution of the wealthier nobles. Brutal and sanguinary from the first, his growing madness and his delight in gladiatorial shows fostered his cruelty. He had an actor burned alive in the Forum for venturing even to hint, in an ambiguous phrase, that the Imperial behaviour was reprehensible. Others he had tortured and executed in his presence, in order that he might enjoy the sensation of seeing them suffer. But it was mainly in quest of money to maintain his terrible expenditure that he stooped to the lowest excesses. No man of wealth in Rome was safe. Informers were eager for the fourth part of a victim’s property, to which they were entitled after a successful impeachment; Caligula hungered for the remaining three-fourths. Every ten days he would “clear his accounts,” as he put it, or doom to death any wealthy Senators whom he had chosen to put on his list of suspects. He would return from the court boasting to Cæsonia of the heavy work he had done while she slept. A great terror brooded over the city, and men talked of the Emperor in whispers. Omens and signs multiplied. The statue of Jupiter Olympus had been brought to Rome, and one day the workmen rushed in alarm from the temple in which it was placed, crying that the marble god had burst into a fit of laughter. On January 24th, in the year 41, this appalling gloom came to an end, and the third Emperor and fourth Empress of Rome were justly removed. The long hesitation of the Romans must not too readily be ascribed to cowardice. The Prætorian Guards were now encamped at the edge of the city, and were richly paid for personal loyalty to the Emperor; so that there was very faint hope of a successful rising of the citizens. For the greater part these formidable soldiers were mercenaries, caring nothing for the honour of Rome, faithful as dogs to the liberal master. It was not until an officer of this regiment headed a conspiracy that any action could be taken with a prospect of success. This officer was a favourite of Caligula, but the Imperial friendship was expressed in such coarse and stinging epithets that he was driven to rebel. He and his associates determined to assassinate Caligula when he attended the Palatine games in the later part of January. A large wooden theatre had been erected for the occasion, and Caligula presided with delight at the repulsive spectacles. Such was the popular enthusiasm that the conspirators surrounded Caligula day after day without daring to touch him. His German guard, insensible to the grievances of the Romans, would at once and blindly oppose a rising, and the people seemed to have forgotten his tyranny in the blood-reeking show he had provided for them.