. . "John Penn and Son" . . . . . . . "John Penn & Son" . . "John Penn (engineer)" . . . . . "John Penn and Sons" . "John Penn" . . "John Penn & Sons" . . . . . . . . . . . "John Penn" . "John Penn & Sons Oscillating Steam Engine" . "1805" . . . . . . . . . "Penn" . . . . "J. Penn & Company of Greenwich" . . . . . . . . . . . "1878" . . . . . . . . . . . . "Penn and Sons" . . . "John Penn (engineer)" . . .