Browse Items (2 total) Street Address is exactly "Glen Riddle, Middletown Township (Pa.)" Browse All Search Items Browse Map Browse by Headings Sort by: TitleCreatorDateDate Added Items open in a separate tab. Close the tab to return to this list. Riddle's mills Address: Glen Riddle, Middletown Township (Pa.) Date: 1894 According to Henry S. Pearson, in Middletown Township, Delaware County, Pa. (1985), p. 120, this was originally a nail mill that Samuel Riddle converted to a textile mill after purchasing it in 1875. As late as 1983, the mill was occupied b the… Riddle's race Address: Glen Riddle, Middletown Township (Pa.) Date: 1894 The mill race is rejoining Chester Creek downstream of the Riddle’s Mill, near Glen Riddle. See AP-5183-2 for more information.