 John L. DuFief built a mill around 1850 on the Muddy Branch, and it had a road that connected to the Pennyfield Lock.His mill had the capacity to manufacture 10–12,000 barrels of flour per year, and a network of roads grew that enabled farmers to get their crops to the mill and canal.The DuFief Mill was about from the Travilah crossroads, and an alternative mill (Glen Mill) was 3.3 miles away.