• Chandlee, B. "Six Quaker Clockmakers". Historical Society of Pennsylvania. [John Weight (JWeight@CASMAIL.CALACADEMY.ORG)]
• Drepperd, Carl W. "American Clocks and Clock makers". Doubleday. [John Weight (JWeight@CASMAIL.CALACADEMY.ORG)]
• Hoopes, Penrose. "Connecticut Clock Makers of the Eighteenth Century". Edwin Valentine Mitchel Inc. [John Weight (JWeight@CASMAIL.CALACADEMY.ORG)]

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