The bombardment was directed, too, against the British ships in the harbor with equal effect. Here “red hot shot” were used to ignite the heavily tarred rigging and ship timbers. On the night of October 10, artillery “set fire to two transport vessels and to the ship of war Charon ... [44 guns], which burned completely. The other ships anchored under York set sail in the night and went over to anchor at Gloucester, to put themselves under shelter and out of range of our fire.” Other boats, large and small, including the _Guadaloupe_ (28 guns), were hit and burned. On the night of the 11th, a British “fire ship,” designed for setting fires to enemy vessels, was struck and burned with a brilliant blaze. Against such heavy artillery fire, Cornwallis found it difficult to keep his own batteries in operation, and even the sailors and marines from the English vessels added little strength. SECOND ALLIED SIEGE LINE. The destruction caused by the superior French and American artillery, firing at ranges from 800 to 1,200 yards, was so great and the enemy batteries were so completely overpowered that Washington was soon ready to open the Second Allied Siege Line, which would bring his troops within storming distance of the enemy works. An “over the top” charge by the infantry would be the final stage of the siege should Cornwallis continue to hold out. Work on the second line began on the night of October 11-12, about midway between the first siege line and the left front of the British works. By morning, the troops had wielded their shovels, spades, and “grubbing hoes” so effectively that the work was well advanced and casualties were few. For the next 3 days the construction continued and artillery was moved from the first line into the new positions where it could be even more deadly. The British gunners did all they could with “musketry, cannon, cannister, grapeshot, and especially, a multitude of large and small bombs and shells” to delay the work, but, although they exacted some casualties, they were not particularly successful. At this time, however, only half of the second siege line could be undertaken. British Redoubt No. 10 near the river, a square position manned by about 70 soldiers, and Redoubt No. 9, a 5-sided strong point held by approximately 125 troops, near the road from Yorktown to the Moore House, blocked the extension of the second line on the allied right. Before work could proceed, these would have to be reduced. CAPTURE OF REDOUBTS NO. 9 AND NO. 10.