Hood. He immediately debarked the troops from his fleet to assist Lafayette in blockading Cornwallis, and stationed some his ships to blockade the York and James Rivers. News of de Barras' sailing reached New York on August 28, where Graves, Clinton, and Hood were meeting to discuss the possibility of making an attack on the French fleet in Newport, since the French army was no longer there to defend it. Clinton had still not realized that Washington was marching south, something he did not have confirmed until September 2. When they learned of de Barras' departure they immediately concluded that de Grasse must be headed for the Chesapeake (but still did not know of his strength). Graves sailed from New York on August 31 with 19 ships of the line; Clinton wrote Cornwallis to warn him that Washington was coming, and that he would send 4,000 reinforcements. On September 5, the British fleet arrived at the mouth of the Chesapeake to see the French fleet anchored there. De Grasse, who had men ashore, was forced to cut his cables and scramble to get his fleet out to meet the British. In the Battle of the Chesapeake, de Grasse won a narrow tactical victory. After the battle, the two fleets drifted to the southeast for several days, with the British avoiding battle and both fleets making repairs. This was apparently in part a ploy by de Grasse to ensure the British would not interfere with de Barras' arrival. A fleet was spotted off in the distance on September 9 making for the bay; de Grasse followed the next day. Graves, forced to scuttle one of his ships, returned to New York for repairs. Smaller ships from the French fleet then assisted in transporting the Franco-American army down the Chesapeake to Yorktown, completing the encirclement of Cornwallis. Yorktown On September 6, General Clinton wrote a letter to Cornwallis, telling him to expect reinforcements. Received by Cornwallis on September 14, this letter may have been instrumental in the decision by Cornwallis to remain at Yorktown and not try to fight his way out, despite the urging of Banastre Tarleton to break out against the comparatively weak Lafayette. General Washington, after spending a few days at Mount Vernon for the first time in years, arrived in the camps outside Yorktown on September 17. That same day, the British military leadership in New York held