Only after 2 years of research did I find that there was archived correspondence between Quaker merchant Henry Drinker and Jacob Brumbaugh and later his son Jacob, Jr. Henry had been one of twenty Philadelphia Quakers exiled to Virginia by Philadelphia authorities shortly before British Gen. William Howe arrived to occupy Philadelphia for the winter of 1777-78. Jacob first bought a land tract from Henry in 1785, then signed an agreement for another one in the early 1790s and one also in 1797, which was not completed until 1803 after Jacob Sr. had died in 1799. Jacob Jr. personally brought the last installment to Drinker’s home and breakfasted with the Drinkers in August 1803. Drinker’s wife Elizabeth Sandwith Drinker recorded that fact in her 50-year diary which is the most complete contemporary record of manners of eighteenth-century Philadelphia and is  lodged at the Historical Society of Pennsylvania.