As the sun set, the six surviving French ships continued to flee to the north west, with those British ships not slowed by battle damage close behind them. There was sufficient moonlight to allow the British ships to keep in touch, although the two fastest French ships, "Souverain" and "Guerrier", slipped away into the Atlantic during the night. The naval historian Nicholas Tracey suggests La Clue sailed an incorrect course, failed to Cape St. Vincent, and became trapped against a lee shore. The badly wounded La Clue now had command only over his flagship and three other ships of the line, "Redoutable", "Téméraire" and "Modeste", none of which had yet been engaged. Despairing of escape, he led the remnants of his fleet to a small river west of Lagos in Portugal. Portugal was neutral and it would be illegal for Boscawen to attack him there. There was also a small Portuguese fort overlooking the anchorage and La Clue may have hoped this would be some deterrent.