OK rgb1 here ya go...
Some of his primary sources outside of the Alexandria, VA. Library for Prather's research were 'Genealogy of the Roberdeau Family' by Roberdeau Buchanan and 'The memoirs of Gen. Joseph Gardner Swift LL. D., U.S.A.' the first graduate of the United States Military Academy, West Point.
Jonathan Swift was born 3,27or22 1764 to Samuel and Ann Foster Swift of Milton, Massachusetts and was the 7th of 9 children.
His father, Samuel Swift (1715-1775) participated in the Boston Tea Party by dressing as a Mohawk Indian and may have been a practicing law partner with John Adams. He went to Harvard College, studied law and graduated 1735. He died while being imprisoned in his own house by the British.
Jonathan Swift, merchant married Nancy (or Ann) Roberdeau the elder daughter of Gen. Roberdeau of Alexandria Sept, 24 1785. Swift was considered an importer and merchant.
Gen. Daniel Roberdeau (Swift's father in law) born 1727 in the British West Indies. He had a 1/8 share and was acting treasurer in two privateering vessels in 1776 called Chance and Congress that formed a company. In 1777 he served in the Continental Congress and served two terms. In 1778 he was granted a leave of absence from congress to allow him to manage the working of a lead mine for the army. He erected a fort, Ft. Roberdeau near Altoona, Pennsylvania an area called Sinking Spring Valley in Bedford County, to protect the mine operation with some 10 continental soldiers and 40 militia. Letters he had written about the Lead mine are quoted starting on page 74 of the book. Odd, but there is a reference to 'Standing Stone', a 'Morrison's Cave' and accounts of fighting Indians in these letters. Looks like he financed the building of the fort himself and was never repaid by congress for it. After the war he did not return to his previous business.