The confidence of Mr. Astor was abused in another quarter.  Two of the partners, both of them Scotchmen, and recently in the service of the Northwest Company, had misgivings as to an enterprise which might clash with the interests and establishments protected by the British flag.  They privately waited upon the British minister, Mr. Jackson, then in New York, laid open to him the whole scheme of Mr. Astor, though intrusted to them in confidence, and dependent, in a great measure, upon secrecy at the outset for its success, and inquired whether they, as British subjects, could lawfully engage in it.  The reply satisfied their scruples, while the information they imparted excited the surprise and admiration of Mr. Jackson, that a private individual should have conceived and set on foot at his own risk and expense so great an enterprise.

This step on the part of those gentlemen was not known to Mr. Astor until some time afterwards, or it might have modified the trust and confidence reposed in them.

To guard against any interruption to the voyage by the armed brig, said to be off the harbor, Mr. Astor applied to Commodore Rodgers, at that time commanding at New York, to give the Tonquin safe convoy off the coast.  The commodore having received from a high official source assurance of the deep interest which the government took in the enterprise, sent directions to Captain Hull, at that time cruising off the harbor, in the frigate Constitution, to afford the Tonquin the required protection when she should put to sea.

Before the day of embarkation, Mr. Astor addressed a letter of instruction to the four partners who were to sail in the ship.  In this he enjoined them, in the most earnest manner, to cultivate harmony and unanimity, and recommended that all differences of opinions on points connected with the objects and interests of the voyage should be discussed by the whole, and decided by a majority of votes.  He, moreover, gave them especial caution as to their conduct on arriving at their destined port; exhorting them to be careful to make a favorable impression upon the wild people among whom their lot and the fortunes of the enterprise would be cast.  “If you find them kind,” said he, “as I hope you will, be so to them.  If otherwise, act with caution and forebearance, and convince them that you come as friends.”

With the same anxious forethought he wrote a letter of instructions to Captain Thorn, in which he urged the strictest attention to the health of himself and his crew, and to the promotion of good-humor and harmony on board his ship.  “To prevent any misunderstanding,” added he, “will require your particular good management.”  His letter closed with an injunction of wariness in his intercourse with the natives, a subject on which Mr. Astor was justly sensible he could not be too earnest.  “I must recommend you,” said he, “to be particularly careful on the coast, and not to rely too much on the friendly disposition of the natives.  All accidents which have as yet happened there arose from too much confidence in the Indians.”