It is another example of a tax which it may pay the Revenue to collect but which, I am sure, does not pay the economy as a whole. The total revenue from all bills of exchange, including cheques, is about £9 million. This revenue is raised in twopences. The Clause goes on to provide that any such instrument, that is, a bill of exchange,
may be marked by or on behalf of the banker".
What does this operation of marking involve?