The Mirror Problem.
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The Editor, THE COMMERCIAL MOTOR.
 Sir,—As a matter of general interest to users of commercial vehicles, arid of warning to their drivers, I have pleasure in enclosing to you correspondence which has passed between this companyand another road user recently. Anything you can do to appeal to drivers to pay more attention to vehicles following them would be of excellent service to the travelling public.—Yours faithfully,
T. E. HARRISON, for Waring and Gillow, Ltd.