asked the Chancellor of the Exchequer whether the Customs duty which is levied on goods from Germany is, in the case of invoices which are expressed in marks, levied on the current exchange value of the mark or on the actual value of the goods?

In the case of all goods liable to an ad valorem duty the statutory value is based on the price which an importer would pay for the goods delivered at the port of importation, and in practice, in the absence of any suspicion of bad faith, is calculated on the invoice price. If this is expressed in foreign currency it is converted into sterling at the rate of exchange current on the date on which the importing ship is reported under the Customs Act.

Does this.not mean that the greater the depreciation of the mark, the smaller the amount of duty which the hon. Gentleman will get on any given article?

That is a matter for inference.

Is it not really a matter of arithmetic?

Then it is hardly a matter for a question.