The foreign trade of the United States has increased during the last forty years about 370 per cent.... This increase ... reflected not alone our own marvellous development, but as well the wonderful growth of trade throughout the world. The United States stands third among the countries of the world, its foreign trade being exceeded only by that of the United Kingdom ... and Germany.... Our imports and exports[108] are being financed more and more by means of what are known as commercial letters of credit.... An explanation of the operation of the commercial letter of credit will ... disclose the methods and conditions under which our imports are financed. The commercial letter of credit is an authorization, say of an American bank to its London correspondent, to honor drafts for its account drawn at various tenors by foreign shippers or others against shipments of merchandise to this country. These credits are of two kinds, documentary and clean. Under the documentary credit the London bank is authorized to accept drafts for the account of the American bank only when the bill of exchange is accompanied by certain documents described in the letter of credit. These documents may be the bills of lading for the goods, consular invoices, insurance certificates and possibly other papers. Probably a large proportion of such credits requires that drafts be drawn at sixty or ninety days' sight. So many elements of danger are involved in financing commodities under commercial letters of credit, even where the control of the goods is given to the bank issuing the credit or its agents, that the financial standing of those asking for credits must be the first consideration in their issuance. Dishonesty on the part of the shipper, resulting in a drawing under the credit against forged documents or against shipments of inferior merchandise, is always possible, and the financial responsibility of the buyer of the credit is all that stands between the banker issuing the credit and a loss in such cases.