She became his mistress, returning to England to live openly with him, and eventually they had a daughter, Horatia. Some have suggested that a head wound he received at Abukir Bay was partially responsible for that conduct, and for the way he conducted the Neapolitan campaign, now considered something of a disgrace to his name. In 1799 he was promoted to Rear Admiral of the Red, the fifth highest rank in the Royal Navy. He was then assigned to the Foudroyant. In July, he aided with the reconquest of Naples, and was made Duke of Bronte by the Neapolitan king. His personal problems, and upper-level disappointment at his professional conduct caused him to be rotated back to England, but public knowledge of his affection for Lady Hamilton eventually induced the Admiralty to send him back to sea if only to get him away from her. On January 1, 1801, he was promoted to Vice Admiral of the Blue (the fourth highest rank). Within a few months he was involved in the Battle of Copenhagen (April 2, 1801), which nullified the fleet of the Danes, in order to break up the armed neutrality of Denmark, Sweden and Russia. The action was considered somewhat underhanded by some, and in fact Nelson had been ordered to cease the battle by his commander Sir Hyde Parker. In a famous incident, however, he claimed he could not see the signal flags conveying the order, pointedly raising his telescope to his blind eye. His action was approved in retrospect, and in May he became commander-in-chief in the Baltic Sea, and was awarded the title of Viscount by the British crown. Napoleon was amassing forces to invade England, however, and Nelson was soon placed in charge of defending the English Channel to prevent this. However, on October 22 an armistice was signed between the British and the French, and Nelson -- in poor health again -- retired to England where he stayed with his friends the Lord and Lady Hamilton. The Peace of Amiens was not to last long though, and Nelson soon returned to duty. He was appointed commander-in-chief of the Mediterranean, and assigned to the HMS Victory. He joined the blockade of Toulon, France, and would not again set foot on dry land for more than two years. After the French fleet slipped out of Toulon and headed for the West Indies, a stern chase failed to turn them up and Nelson's health forced him to retire to Merton in England. Within two months his ease ended. On September 13, 1805 he was called upon to oppose the French and Spanish fleets, which had managed to join up and take refuge in the harbour of Cadiz, Spain.