He then resolved to set up marks to indicate the limits to which he had advanced; so first of all he built altars to the twelve gods of 50 cubits in height. Having next enclosed an encampment thrice the size of the one he occupied, he dug round it a trench 50 feet broad and 40 feet deep, and with the earth cast up from this trench he erected a rampart of extraordinary dimensions. He further ordered quarters to be constructed as for foot-soldiers, each containing two beds 5 cubits in length for each man, and besides this accommodation, two stalls of twice the ordinary size for each horseman. Whatever else was to be left behind was directed to be likewise proportionately increased in size. His object in all this was not merely to make a camp as for heroes, but at the same time to leave among the people of the country tokens of mighty men to show with what enormous bodily strength they were endowed. When these works were finished he retraced his steps with all his army to the river Akesinês.[354] On reaching it he found that the boats had been built, and when he had rigged these out, he ordered an additional number to be constructed. At this time there arrived from Greece allies and mercenaries led by the generals in command of the allies, amounting to more than 30,000 foot and not much less than 6000 cavalry. Splendid full suits of armour besides were brought for the infantry to the number of 25,000,[355] and 100 talents of medicinal drugs, all which he distributed among the soldiers. When the equipment of the fleet was finished, and 200 boats without hatches and 800 tenders had been got ready, he proceeded to give names to the cities which had been founded on the banks of the river, calling one Nikaia in commemoration of his victory, and the other Boukephala after his horse that perished in the battle with Pôros. _Chapter XCVI.—Voyage to the Southern Ocean begun—Submission of the Siboi—The Agalassians attacked and conquered_