Upon arrival they first settled in Chester County, Pennsylvania, where they remained nearly seven years, when they removed to what is now Lurgan Township, Franklin County, on an estate, which is still in possession of their descendants.
Here John, son of Charles, the immigrant, built a mill in 1755, which, with modern improvements and alterations, is still operated by the third succeeding generation. This mill was stockaded during the French and Indian War, as it was located on the well-traveled highway leading from McAllister’s Gap to Shippensburg.
During the Revolution every male member of the Maclay family, of military age, was in the service, and every one an officer.
John Maclay, the younger of the immigrant brothers, married Jane MacDonald in 1747. To this union were born three sons and one daughter; John born 1748, a soldier of the Revolution, died 1800; Charles, born 1750, a captain in the Continental Army, who fell in the action at Crooked Billet, 1778; Samuel, born 1751, also an officer, fell at Bunker Hill; Elizabeth, wife of Colonel Samuel Culbertson, of the Revolution.
Charles Maclay, the elder immigrant brother, died in 1753. His wife, Eleanore, whom he had married in Ireland, died in 1789. To them were born four sons and one daughter: John, born in Ireland, 1734, for many years a magistrate, and in 1776 he was a delegate to convention in Carpenters’ Hall, Philadelphia. He also served in the General Assembly, 1790–1792 and 1794; William, born in Chester County, July 20, 1737, whose sketch appears in another story; Charles, also born in Chester County, in 1739, was a soldier of the Revolution, died in 1834 at Maclays Mills; Samuel, the subject of our sketch, was born June 17, 1741.
Samuel Maclay was educated in the classical school conducted by Dr. J. Allison, of Middle Spring. He also mastered the science of surveying, which he followed for years. In 1769 he was engaged with his brother William and Surveyor General Lukens in surveying the officers’ tracts on the West Branch of the Susquehanna, which had been awarded to the officers of First Battalion in Bouquet’s expedition.
A coincident fact is that the remains of this distinguished patriot lie buried on the allotment awarded Captain John Brady, who drew the third choice, and which was surveyed for him by Maclay.
Samuel Maclay, November 10, 1773, married Elizabeth, daughter of Colonel William Plunket, then President Judge of Northumberland County, and commandant of the garrison at Fort Augusta. They took up their residence on the Brady tract in Buffalo Valley. To this union six sons and three daughters were born.
From the moment Samuel Maclay became a resident of what is now Union County until his death he was identified with the important history of the valley.
Samuel Maclay was one of the commissioners to survey the headwaters of the Schuylkill, Susquehanna and Allegheny Rivers. The others were Timothy Matlack, of Philadelphia, and John Adlum, of York. They were commissioned April 9, 1789. These eminent men were skilled hydrographical and topographical engineers and completed the first great survey of Pennsylvania.