Olympius had entrusted the command of the little garrison of armed men to Memnon, a veteran legate of great experience, who had lost his left arm in the war against the Goths.  The high-priest himself was occupied alternately in trying to persuade the hastily-collected force to obey their leader, and in settling quarrels, smoothing difficulties, suppressing insubordination, and considering plans with reference to supplies for his adherents, and the offering of a great sacrifice at which all the worshippers of Serapis were to assist.  Karnis kept near his friend, helping him so far as was possible; Orpheus, with others of the younger men, had been ordered to the roof, where they were employed—­ under the scorching sun, reflected from the copper-plated covering and the radiating surface of the dome—­in loosening blocks of stone from the balustrade to be hurled down to-morrow on the besieging force.

Herse devoted herself to the sick and wounded, for a few who had ventured forth too boldly to aid in barricading the entrance, had been hurt by arrows and lances flung by the idle soldiery; and a still greater number were suffering from sun-stroke in consequence of toiling on the top of the building.

Inside the vast, thick-walled halls it was much cooler than in the streets even, and the hours glided fast to the besieged heathen.  Many of them were fully occupied, or placed on guard; others were discussing the situation, and disputing or guessing at what the outcome might, or must be.  Numbers, panic-stricken or absorbed in pious awe, sat huddled on the ground, praying, muttering magical formulas, or wailing aloud.  The Magians and astrologers had retired with knots of followers into the adjoining studies, where they were comparing registers, making calculations, reading signs, devising new formulas and defending them against their opponents.

An incessant bustle went on, to and fro between these rooms and the great library, and the tables were covered with rolls and tablets containing ancient prophecies, horoscopes and potent exorcisms.  Messengers, one after another, were sent out from thence to command silence in the great halls, where the assembled youths and girls were kissing, singing, shouting and dancing to the shrill pipe of flutes and twang of lutes, clapping their hands, rattling tambourines—­in short, enjoying to the utmost the few hours that might yet be theirs before they must make the fatal leap into nothingness, or at least into the dim shades of death.

The sun was sinking when suddenly the great brazen gong was loudly struck, and the hard, blatant clatter rent the air of the temple-hall.  The mighty waves of sound reverberated from the walls of the sanctuary like the surge of a clangorous sea, and sent their metallic vibration ringing through every room and cell, from the topmost observatory-turret to the deepest vault beneath, calling all who were within the precincts to assemble.  The holy places filled at once;