character sketch of the young commander of the ship who gave a good fight at Actium

From the text:

"Among others, there was one person, whose case appeared a little singular. He had a youth about eighteen years old standing by his side. He told me, “he had for many years been commander of a ship; and in the sea fight at Actium had the good fortune to break through the enemy’s great line of battle, sink three of their capital ships, and take a fourth, which was the sole cause of Antony’s flight, and of the victory that ensued; that the youth standing by him, his only son, was killed in the action.” He added, “that upon the confidence of some merit, the war being at an end, he went to Rome, and solicited at the court of Augustus to be preferred to a greater ship, whose commander had been killed; but, without any regard to his pretensions, it was given to a boy who had never seen the sea, the son of Libertina, who waited on one of the emperor’s mistresses. Returning back to his own vessel, he was charged with neglect of duty, and the ship given to a favourite page of Publicola, the vice-admiral; where-upon he retired to a poor farm at a great distance from Rome, and there ended his life.”