The Mackerel Brigade, my boy, had a great engagement yesterday, and came very near repulsing the enemy. We were ordered to march forward in three columns, until we came within five miles of the enemy, Colonel Wobbles leading the first; Mr. Wobbles, the second; and Wobbles, the third. In the advance our lines presented the shape of a clam-shell, but as we neared the point of danger, they gradually assumed more of the form of a cone, the rear-guard being several times as thick as the advance guard. When within six miles of the seceshers, we planted our battery of four six pounders, and opened a horrible fire of shot and shell on the adjacent country. The seceshers replied with a hail of canister and shrapnell, and for eight hours the battle raged fearfully, but without hurting anybody, as the hostile forces were too far apart to reach each other with shot. Finally, Colonel Wobbles sent a messenger, by railroad, to ask the seceshers what they wanted, and they said they only wanted to be let alone. On receiving this reply, Colonel Wobbles was much affected, and ordered us to march back to camp, which we did. This affair was really a great victory for the Union, my boy, and I cannot refrain from giving short biographical sketches of the leaders concerned in it, commencing with COLONEL WOBBLES. This gallant officer, on whom the eyes of the whole world are now turned, was born at an exceedingly early age, in the place of his nativity. When but a mere boy, he evinced a fondness for the law, and his father, who was his mother's husband, placed him in the office of the late Daniel Webster. He practised law for some years, but failed to find any clients, and finally started a grocery store under Jackson's administration. At this time, Calhoun's peculiar views were agitating Christendom, and Mr. Wobbles married a daughter of the late John Thomas, by whom he had no children. When the war broke out in Mexico, he left the grocery business, and opened a liquor store on the estate of the late J. Smith, and accumulated sufficient money to send his family into the country. Colonel Wobbles is now about eighty-five years old. MR. WOBBLES.