The unfortunate young man was on the eve of being married to a lady in Hampshire, to whom for some time he had paid his addresses. BETWEEN LIEUT.-COLONEL MONTGOMERY AND CAPTAIN MACNAMARA. April 6, 1803. As Lieutenant-Colonel Montgomery and Captain Macnamara were riding in Hyde Park, each followed by a Newfoundland dog, the dogs fought; and Colonel Montgomery, who did not see that Captain Macnamara was near, after separating the animals, exclaimed, “Whose dog is that? I will knock him down!” To which Captain Macnamara replied, “Have you the impudence to say that you will knock my dog down? You must first knock me down.” An altercation ensued, an exchange of cards followed, and an appointment to meet at 7 o’clock in the evening, near Primrose Hill; the consequence of which proved fatal. Captain Macnamara’s ball entered the right side of Colonel Montgomery’s chest, and taking a direction to the left, most probably went through the heart; he instantly fell, without uttering a word, but rolled over two or three times as if in great agony, and groaned. Colonel Montgomery’s ball went through Captain Macnamara, entering on the right side, just above the hip, and passing through the left side, carrying part of the coat and waistcoat in with it, taking part of his leather breeches, and the hip button, away with it on the other side. Colonel Montgomery was carried by some of the persons standing by, into Chalk Farm, where he was laid on a bed, attended by Mr. Heaviside. As they were carrying him, he attempted to speak and spit; but the blood choked him. His mouth foamed much; and in about five minutes after he was brought into the house, he expired with a gentle sigh. Captain Macnamara was a naval officer, who has much distinguished himself in two or three actions, as commander of the Cerberus frigate. He had lately returned from the West Indies; and his ship was, about two months ago, paid off at Chatham. He was about thirty-six years of age; a strong, bold, active man. He had fought two or three duels before; and was remarkable at Cork, for keeping the turbulent in awe.