Dorothea McKenzie, the daughter of a Quaker ironmaster, became a widow at the age of 38, never remarried, and, until her death, ran a genteel boarding house in Carlisle with the help of her slaves. Dorothea’s father, Thomas Maybury, established the Green Lane Forge in the Perkiomen Valley in what is now Montgomery County, Pennsylvania as well as the Hereford Furnace. Her mother, Sophia Rutter, was a descendant of Pennsylvania ironmaster, Thomas Rutter.
"'Black Jack’ was a famous cook,” wrote Jeremiah Zeamer, editor of the American Volunteer newspaper. “He had a great reputation as a cook and caterer. Whenever in that part of the county there was a wedding, a dance, or a party of any kind for which a feast was to be prepared, ‘Black Jack’ was sent for to superintend the cooking and set the table, and so well did he do this that he was always in high favor with people who had appetites.”