 The name Glen Mills is taken from two paper mills built by the Willcox family, one in 1835 and the second in 1846.From 1864 to 1878, these mills supplied the United States government with a special, patented paper for the printing of government bonds and notes.The Glen Mills are no longer standing, but the grist mill built by Nathaniel Newlin in 1704 still stands and is a popular destination for picnickers and history buffs alike.