In the way, besides, in which the par of exchange has hitherto been computed, the ordinary course of exchange can afford no sufficient indication that the ordinary state of debt and credit is in favour of that country which seems to have, or which is supposed to have, the ordinary course of exchange in its favour; or, in other words, the real exchange may be, and in fact often is, so very different from the computed one, that, from the course of the latter, no certain conclusion can, upon many occasions, be drawn concerning that of the former.