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 cannot be reached by any weapon, so built that no wood or material subject to fire shall be on the outside,—which they erect story by story, of very great strength. And as they raise this step by step, each story is secured against fire and against the enemy. The reader,—probably not an engineer himself,—is disposed to think as he struggles through this minute description of the erection which Cæsar gives, and endeavours to realise the way in which it is done, that Cæsar must himself have served specially as an engineer. But in truth he was not at this siege himself, and had nothing to do with the planning of the tower, and must in this instance at least have got a written description from his officer,—as he probably did before when he built the memorable bridge over the Rhine. And when the tower is finished, they make a long covered way or shed,—musculum or muscle Cæsar calls it; and with this they form for themselves a passage from the big tower to a special point in the walls of the town. This muscle is so strong with its sloping roof that nothing thrown upon it will break or burn it. The Massilians try tubs of flaming pitch, and great fragments of rock; but these simply slip to the ground, and are pulled away with long poles and forks. And the Cæsareans, from the height of their great tower, have so terrible an advantage! The Massilians cannot defend their wall, and a breach is made, or almost made.

The Massilians can do no more. The very gods are against them. So they put on the habit of supplicants, and go forth to the conquerors. They will give their city to Cæsar. Cæsar is expected. Will Trebonius