Tlie Laic C olonel llalilKroii.Though Colouel LMrio Dahlgren washut twentv-two years old at the time of * *his death, he had already seen considerable service. Ucfore the war he held a position in the navy, and even after the attack on Sumpter was offered great inducements to enter the rebel service. Of course, these overtures were unheeded, and the young man entered the Federal army as aid-de-camp, lie served with General Saxton under Fremont, and participated in the battle of Cross-Keys, and after Fremont was relieved from his command was transferred to the staff of ( Jen. Higel, by whf*m he was selected for the dangerous duty*of scouting with cavalry for bushwackere #ho, led by White and Mosby, then infested northern Virginia. Ononc ofthcse expeditions Captain Ihihl-•gren made a hold dash into Frederieks-hutg, defeating a band of rebels in ttic streets.Sigel was relieved of his command too and Uahlgrcu was once more transferred to the staff of General Hooker, then commanding the army of the Potomac. At the baftld of Clnncellorsvilic lie fought well, and during the rebel invasion of 180-1 performed a number of exploits as successful as they were daring. After the battle of Gettysburg, during a charge into Hagerstown, he was wounded jn the right foot flhieh vas afterwards amputated. A few months ago the President appointed I Captain I'ahlgrcn Colonel of the Third I nited States Voluutecrcav.ihy, jynl while the regiment was organizing he went to Charleston to visit his father, the Admiral. Hcturn ng through Wash ngton theyoungColonel heard of Kilpatrick's proposed raid and participated in it—fatally, as the result proved—as a volunteer. And s • closed his short though brave and brilliant ca ree r.—1‘Jxch a nge.