One of his daughters became the wife of Thomas Jessup, adjutant-general, U. S. A. His son George married a Miss Livingston, of the noted New York family. This son George greatly distinguished himself at the battle of Tippecanoe in 1811, and subsequently in the Mexican War. He was a major at the time of his defense of Fort Stephenson at Lower Sandusky, and Congress presented him with a medal for his gallantry. A splendid monument has been erected to his memory at Fremont, Ohio. The elder Croghan died in 1822, and his widow in 1838. Frances Eleanor Clark, youngest daughter of the old hero, married Dr. James O’Fallon, whom the memoir says was a finely-educated Irishman who came to America shortly before the Revolution. He was an officer during the War for Independence, and was the founder of the well-known O’Fallon family of St. Louis, which has been so conspicuous in the history of that great city. There is also a town named after one of the members of this family in St. Clair county, this state. To his two grandsons, John and Benjamin O’Fallon, General Clark willed 3,000 acres of land. Another nephew and heir of the general was George Rogers Clark Sullivan, who was honorably identified with Indian affairs during the territorial period, and who left a long line of prominent descendants, after one of which is named Sullivan county in that state. In Gen. George Rogers Clark’s force for the conquest of Kaskaskia, Cahokia, and Vincennes were many men with Irish names, and when we take into account the Irish then so very numerous in Pennsylvania and Virginia, it would not be surprising if one half of it was composed of Irishmen and Irish-Americans. In this force were 236 privates, besides officers. Some of the names of the latter are as follows: Major Thomas Quirk (who was originally a sergeant in Captain McHarrod’s company and rendered some military service on the frontier before and after the Illinois campaign). Clark’s biographer says, “Quirk was a brave and a fine-looking Irishman.” He died in Louisville, Kentucky, in the fall of 1803. He was allotted 4,312 acres of land for his valuable army services. Capt. John Montgomery, who is stated in one place to be “an Irishman full of fight,” was one of Clark’s most valued officers, and had been one of the celebrated party of “Long Hunters.” Col. John Campbell, who was one of the commissioners for the allotment of Clark’s land grant of 149,000 acres, to the men engaged in his Illinois campaigns, was an Irishman by birth, and a man accredited with much force of character. He was a member of the Kentucky convention of 1792, and a member of the legislature. He died without issue. After Campbell came James F. Moore, Alex. Breckenridge, Richard Taylor, and Robert Breckenridge, as land commissioners. James F. Moore had been a soldier under Clark, and also, subsequently, a member of the Kentucky house of representatives.