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Sellers, William (19 Sept. 1824–24 Dec. 1905), mechanical engineer and manufacturer, was born in Upper Darby outside Philadelphia, Pennsylvania, the eldest son of Quakers John Sellers, a miller, farmer, and abolitionist, and Elizabeth Poole. At age six William went to live on weekdays at his grandfather John Sellers’s farm in Upper Darby, attending the nearby school his grandfather and his Quaker neighbors had founded, and learning to work on his farm and mill. At age fourteen he apprenticed to his uncle John Morton Poole, making textile machinery in Delaware. At age twenty-one he went to work for his brother-in-law Edward Bancroft in Providence, Rhode Island, making mill equipment and steam engines....