. . . . "at the manufacturers" . . . "1820" . . "John Thompson" . . . . . "John Thompson (company)" . "John Thompson Limited" . . "John Thompson Water Tube Boilers Limited" . "John Thompson (Wolverhampton)" . "John Thompson (company)" . "John Thompson Ltd." . . . . . . . . . "Acquired" . . "John Thompson Ltd" . . . .