D’Estaing’s fleet consisted of twenty-two sail-of-the-line, excluding transports and privateers which had attached themselves to him, and it was commonly reported that he had no fewer than 20,000 troops on board. Nelson, as noted above, was now Post-Captain, and although he had no occasion to prove his ability as a commander of land batteries, he seems to have taken kindly to the situation. In a letter to his friend Captain Parker, dated the 12th August 1779, he states that “Jamaica is turned upside down since you left it,” and furnishes particulars of the measures made for the defence of the island. “You must not be surprised to hear of my learning to speak French,” he remarks as a humorous aside. To help to achieve the downfall of the wily d’Estaing was not to fall to Nelson’s lot. That worthy hastened to Savannah, which was attacked by troops under General Lincoln and himself. They were routed by the British lines, whereupon d’Estaing sailed away. Great Britain was now at war with Spain, which had thrown in her lot with France, and was soon to feel the effects of the Armed Neutrality, consisting of Russia, Sweden, Denmark, Holland, and Prussia. They resented England’s right to search neutral ships, with the result that the latter Power could not retain her supremacy at sea, a cause of Cornwallis’s surrender at Yorktown and the consequent loss of the American Colonies. In January 1780 it was resolved to make an attempt to take the important post of Fort San Juan, on the river of that name. This would materially aid the British to secure the city of Granada, on Lake Nicaragua, and to sever the communications of the enemy between their northern and southern dominions. The idea originated with Dalling, Governor of Jamaica, to whom history has scarcely done justice. The naval force was entrusted to Nelson, the command of the troops to Captain John Polson.