1913-1914 Maker of the Invicta cyclecar using an 8hp JAP engine
1920 Advertisement. Clarke's Engineering Works, Clarendon Square, Leamington Spa. Sole agents for Worcestershire for the 'Traffic' Motor Lorry.[1]
1920 Sale of stock-in-Tarde and fittings. 'LOCKE & SON WILL SELL AUCTION, under instructions from CLARKE’S ENGINEER; WORKS.” on the above date, at GARAGE NO. 2. CLARENDON SQUARE, LEAMINGTON SPA, the STOCK-IN-TRADE and FITTINGS, DYNAMO, SHAFTING, Lathe. Electric Drilling Machine, MOTOR and STARTER. Double Emery Wheel. DEASY and PHOENIX CARS. NEW INVICTA CHASSIS, etc.,'[2]