Percival Butler, the fourth son, father of General Wm. O. Butler, was born at Carlisle, Pennsylvania, in 1760. He entered the army as a lieutenant at the age of eighteen; was with Washington at Valley Forge; was in the battle of Monmouth, and at the taking of Yorktown--being through the whole series of struggles in the Middle States, with the troops under the commander-in-chief, except for a short period when he was attached to a light corps commanded by La Fayette, who presented him a sword. Near the close of the war he went to the South with the Pennsylvania brigade, where peace found him. He emigrated to Kentucky in 1784. He was the last of the old stock left when the war of 1812 commenced. He was made adjutant-general when Kentucky became a State, and in that capacity joined one of the armies sent out by Kentucky during the war. Edward Butler, the youngest of the five brothers, was too young to enter the army in the first stages of the Revolution, but joined it near the close, and had risen to a captaincy when Gen. St. Clair took the command, and led it to that disastrous defeat in which so many of the best soldiers of the country perished. He there evinced the highest courage and strongest fraternal affection, in carrying his wounded brother out of the massacre, which was continued for miles along the route of the retreating army, and from which so few escaped, even of those who fled unencumbered. He subsequently became adjutant-general in Wayne's army. Of these five brothers four had sons--all of whom, with one exception, were engaged in the military or naval service of the country during the last war. 1st. General Richard Butler's son, William, died a lieutenant in the navy, early in the last war. His son, Captain James Butler, was at the head of the Pittsburg Blues, which company he commanded in the campaigns of the Northwest, and was particularly distinguished in the battle of Massissinnawa. 2d. Colonel William Butler, also of the revolutionary army, had two sons, one died in the navy, the other a subaltern in Wayne's army. He was in the battle with the Indians in 1794. 3d. Lieut. Col. Thomas Butler, of the old stock, had three sons, the eldest a judge. The second, Col. Robert Butler, was at the head of Gen. Jackson's staff throughout the last war. The third, William E. Butler, also served in the army of Gen. Jackson. 4th. Percival Butler, captain in the revolutionary war, and adjutant-general of Kentucky during the last war, had four sons: first, Thomas, who was a captain, and aid to Gen. Jackson at New Orleans. Next, Gen. William O. Butler, the subject of this notice. Third, Richard, who was assistant adjutant-general in the campaigns of the war of 1812. Percival Butler, the youngest son, now a distinguished lawyer, was not of an age to bear arms in the last war. Of this second generation of the Butler's, there are nine certainly, and probably more, engaged in the present war.