"As far up the Missouri as the white settlements extend, an intercourse will probably be found to exist between them and the Spanish posts of St. Louis opposite Cahokia, or St. Genevieve opposite Kaskaskia. From still further up the river the traders may furnish a conveyance for letters. Beyond that you may perhaps be able to engage Indians to bring letters for the government to Cahokia, or Kaskaskia, on promising that they shall there receive such special compensation as you shall have stipulated with them. Avail yourself of these means to communicate to us, at seasonable intervals, a copy of your journal, notes and observations of every kind, putting into cypher whatever might do injury if betrayed. "Should you reach the Pacific ocean, inform yourself of the circumstances which may decide whether the furs of those parts may not be collected as advantageously at the head of the Missouri (convenient as is supposed to the waters of the Colorado and Oregan or Columbia) as at Nootka Sound, or any other point of that coast; and that trade be consequently conducted through the Missouri and United States more beneficially than by the circumnavigation now practised. "On your arrival on that coast, endeavour to learn if there be any port within your reach frequented by the sea vessels of any nation, and to send two of your trusty people back by sea, in such way as shall appear practicable, with a copy of your notes; and should you be of opinion that the return of your party by the way they went will be imminently dangerous, then ship the whole, and return by sea, by the way either of Cape Horn, or the Cape of Good Hope, as you shall be able. As you will be without money, clothes, or provisions, you must endeavour to use the credit of the United States to obtain them; for which purpose open letters of credit shall be furnished you, authorizing you to draw on the executive of the United States, or any of its officers, in any part of the world, on which draughts can be disposed of, and to apply with our recommendations to the consuls, agents, merchants, or citizens of any nation with which we have intercourse, assuring them, in our name, that any aids they may furnish you shall be honourably repaid, and on demand. Our consuls, Thomas Hewes, at Batavia, in Java, William Buchanan, in the Isles of France and Bourbon, and John Elmslie, at the Cape of Good Hope, will be able to supply your necessities, by draughts on us. "Should you find it safe to return by the way you go, after sending two of your party round by sea, or with your whole party, if no conveyance by sea can be found, do so; making such observations on your return as may serve to supply, correct, or confirm those made on your outward journey.