William Penn, founder of the great State of Pennsylvania, Thomas Floyd, the first Governor of the colony, and Anthony Morris, the first mayor of the refined city of Philadelphia, were Welsh. Oliver Evans, so famous for his inventions in high-pressure engines, by means of which all turbid streams could be successfully navigated, was born of a Welsh family near that city. It was found that the sediment of the water choked up or wore off the sliding-valves of the low-pressure engines. He was the third person who received a patent from the United States--Samuel Hopkins being the first--for his inventions, and concerning which President Jefferson remarked that they were "too valuable to be covered by a patent, for they were such things that the people could not do without, once they were known." Mrs. De Witt Clinton was the daughter of Dr. Thomas Jones, the son of a Welsh physician whose father settled at Jamaica, Long Island, and who was widely known as Dr. John Jones. He was attached to the Revolutionary army as a surgeon, and a personal friend of Washington and Franklin. He was one of the founders of the New York Hospital, and a professor in the medical faculty in Columbia College at its institution. He was the first successful lithotomist in the country. Mrs. Clinton was his grand-daughter, having Dr. Thomas Jones for her father, and a daughter of Philip Livingston, signer of the Declaration, for her mother. Maturin Livingston, a son of Philip, married a daughter of General Morgan Lewis. Of Mrs. Clinton it has been said that "she was in every sense a remarkable woman,--not less for her strength of mind than for her noble good breeding, purity, and polish of manners. She was liberal and frank, and fully appreciated the great mind of her noble husband; and the harder the storms of personal and political strife blew upon him, the closer her affections twined around him, while she nobly and devoutly cherished his memory to the last." Their services, in connection with those of almost every other land, have helped to lay the foundations, deep and broad, of the great American republic, whose majestic proportions are rising higher and still higher, commanding the wonder and admiration of all; but, while the later builders are at work, they will not forget to offer some souvenir in behalf of those who worked so wisely and so well. The memory of ALL "smells sweet, and blossoms in the dust." CHAPTER XVII. ADDRESS OF REV. DAVID JONES TO GENERAL ST. CLAIR'S BRIGADE, AT TICONDEROGA, WHEN THE ENEMY WERE HOURLY EXPECTED, OCTOBER 20, 1776. "My countrymen, fellow-soldiers, and friends: