This series consists of books containing the butt copies and returned originals of Boat or Lighter Licence Books.
The butts within each book are continuously numbered but the books do not follow on in continuous order.
A boat or lighter licence was required by persons operating vessels to transport goods which were subject to the control of the Customs Service.
The information contained on the butts are: the name and description of the vessel, length, breadth, tonnage, value, owners name and address and the fee for the issue of the licence.