Under the Roman form of worship, a peculiar act of supplication was performed by the suppliant who kissed his right hand, turned round in a circle by the right, and then seated himself upon the ground. This was done in obedience to one of the laws of Numa. The circular movement of the earth, it was thought, was symbolized by the turning round in a circle; and the sitting down indicated that the suppliant was confidant that his prayer would be granted. The Romans believed that prayers were more efficacious if said in the immediate presence and, if possible, in actual contact with the image of the god. The doorkeepers of the temple were frequently besieged by suppliants who begged to be admitted into the inclosures of the sacred places where they might pray to the deity on the spot. On account of the vast numbers of the gods, the Romans were sometimes at a loss to know which one to address in prayer. Unlike the Greeks, they had no preferences among their deities. Each was supplicated in his turn according to the business in hand. But they were frequently in doubt as to the name of the god who had control of the subject-matter of their petitions. In such cases, the practical genius of the Roman people served them well. They had recourse to several expedients which they believed would insure success. When in doubt as to the particular divinity which they should address in supplication, they would, at times, invoke, in the first place, Janus, the god of all good beginnings, the doorkeeper, so to speak, of the pantheon, who, it was believed, would deliver the prayer to the proper deity. At other times, in such perplexity, they would address their petitions to a group of gods in which they knew the right one was bound to be. It sometimes happened that they did not know whether the deity to be supplicated was a god or goddess. In such an emergency, they expressed themselves very cautiously, using the alternative proviso: "Be thou god or goddess." At other times, in cases of extreme doubt, they prayed to all the deities at once; and often, in fits of desperation, they dismissed the entire pantheon and addressed their prayers to the Unknown God.