At the time that Nicholson arrived in Constantinople, early in the New Year of 1850, the city held a notable prisoner. This was Louis Kossuth, the Hungarian patriot, whom the Austrians had driven into exile. Owing to British influence, the revolutionary leader's asylum in Turkey was rendered safe for the time, but a movement was set on foot by his friends to smuggle him out of the country and convey him to America. Such a project received all Nicholson's sympathies, and when a friend of his—an Englishman who had married a Hungarian lady and served in the Magyar army—enlisted his help, he readily placed himself at the other's service.

The scheme was a simple one. Every day Kossuth took a ride accompanied by a few Turkish soldiers, the route being changed on each occasion. It was accordingly arranged that he should choose to ride on a particular day in the direction of the sea-coast. At a certain spot the conspirators were to await him and his escort, overpower the latter, and carry Kossuth on board an American frigate which was to be at hand.

Unhappily for the patriot, a lady who was in the secret revealed it to a bosom friend, who in turn confided in another. In a short time it came to the knowledge of the Austrian ambassador. Representations were at once made to the Turkish authorities, who redoubled their vigilance, and the plot fell through.

The same friend, "General G——," through whom Nicholson had been interested in the attempt to free Kossuth, now asked the young officer to do him another favour. His wife, a Hungarian lady, as has been said, was imprisoned in an Austrian fortress. So vigorous was the confinement that she was kept in ignorance of her husband's fate, and the General was anxious to send her news of his escape and present whereabouts. Nicholson promptly undertook to convey a letter to the unfortunate lady, should it be possible to do so, and started off immediately for the fortress.

On arriving at his destination, he marched boldly up to the gate of the citadel, demanding to see the officer of the guard.

"I am Major Nicholson of the Indian Army," he said, "and I shall be greatly obliged if you will allow me to see my friend, Madame G——."

The request was undoubtedly an irregular one, but the Austrian officer, after a little demur, courteously gave his permission. Nicholson was then conducted to the prisoner's cell and told that he could have five minutes' conversation, no longer. As soon as the door had closed behind him, and he and Madame G—— were alone, he pulled off one of his boots and drew out the letter, saying, "You have just five minutes to read it, and give me any message for your husband."

"You have just five minutes to read it, and give me any message for your husband."