In 1881 Lemuel Coffin and Joseph B. Altemus from Philadelphia purchsed several farms in Easttown township and initiated the development of the town of Devon.

The history of Devon is described in the following Quarterly articles:

• The Early Development of Devon by Bob Goshorn, TEHS Quarterly, Vol. 29, #4, October 1991
• A History of Devon by Herb Fry, TEHS Quarterly, Vol. 41, #4, Winter 2004

The deed history of Devon is described in the following tables:

• Devon
• Coffin & Altemus Purchases
• Coffin & Altemus Sales