them with armed men when finally
ready to make his assault upon Caesar's lines, and moving them up to the
walls of the citadels and palaces, so as to give to his soldiers the
advantage of a lofty elevation in making their attacks. He levied
contributions on the rich citizens for the necessary funds, and provided
himself with men by pressing all the artisans, laborers, and men capable
of bearing arms into his service. He sent messengers back into the
interior of the country, in every direction, summoning the people to
arms, and calling for contributions of money and military stores.

These messengers were instructed to urge upon the people that, unless
Caesar and his army were at once expelled from Alexandria, there was
imminent danger that the national independence of Egypt would be forever
destroyed. The Romans, they were to say, had extended their conquests
over almost all the rest of the world. They had sent one army into Egypt
before, under the command of Mark Antony, under the pretense of
restoring Ptolemy Auletes to the throne. Now another commander, with
another force, had come, offering some other pretexts for interfering in
their affairs. These Roman encroachments, the messengers were to say,
would end in the complete subjugation of Egypt to a foreign power,
unless the people of the country aroused themselves to meet the danger
manfully, and to expel the intruders.

As Caesar had possession of the island of Pharos and of the harbor,
Ganymede could not cut him off from receiving such re-enforcements of
men and arms as he might make arrangements for obtaining beyond the sea;
nor could he curtail his supply of food, as the granaries and magazines
within Caesar's quarter of the city contained almost inexhaustible stores
of corn. There was one remaining point essential to the subsistence of
an army besieged, and that was an abundant supply of water. The palaces
and citadels which Caesar occupied were supplied with water by means of
numerous subterranean aqueducts, which conveyed the water from the Nile
to vast cisterns built under ground, whence it was raised by buckets and
hydraulic engines for use. In reflecting upon this circumstance,
Ganymede conceived the design of secretly digging a canal, so as to turn
the waters of the sea by means of it into these aqueducts. This plan he
carried into effect. The consequence was, that the water in the cisterns
was gradually changed. It became first brackish, then more and mo