Details held in BT 44/8 Proprietor: Frederick John Whitworth Address: Boston, Lincolnshire Subject of design: Bi-concave Tile
Annotation (BT 43/68) Ornamental Design. Class 4. BI CONCAVE TILE, FREDr JOHN WHITWORTH, BOSTON, LINCOLNSHIRE, PROPRIETOR. J H JOHNSON, 47[?] LINCOLN'S INN FIELDS, LONDON.