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■being agreed to, he ordered a hole to be made in thatpart of the wall opposite to the machine, and gave generalas well as particular notices to the inhabitants, to throwon the other side of the hole, through channels made forthe purpose, all the water, filth, and mud, that could beprocured. These being, during the night, dischargedthrough the hole in great abundance, on the followingday, when the lielepolis was advanced towards the wall,it sunk in the quagmire thus created: and Demetrius,finding himself overreached by the sagacity of Diognetus,drew off his army. The Ehodians, freed from war bythe ingenuity of Diognetus, gave him thanks publicly,and loaded him with honours and ornaments of distinc-tion. Diognetus afterwards removed the helepolis withinthe walls, placed it in a public situation, and inscribed itthus : “ Diognetus presented this to the people outof the spoils of war.” Hence, in defensive operations,ingenuity is of more avail than machines. A similarcircumstance occurred at Chios, where the enemy hadgot ready sambucse on board their ships; the Chians,during the night, threw into the sea, at the foot of theirwall, earth, sand, and stones; so that when the enemy,on the following day, endeavoured to approach it, the shipsgot aground on the heaps thus created under water,without being able to approach the wall or to recede ; inwhich situation they were assailed with fiery missiles,and burnt. When, also, the city of Apollonia was be-sieged, and the enemy was in hopes, by undermining,to penetrate into the fortress unperceived; the spiescommunicated this intelligence to the Apollonians, whowere dismayed, and, through fear, knew not how to act,because they were not aware at what time, nor in whatprecise spot, the enemy would make his appearance.Trypho, of Alexandria, who was the architect to the city,made several excavations within the wall, and, diggingthrough, advanced an arrow’s flight beyond the walls.