Hon. JOHN FORSYTE,
Secretary of State.

SIR: The commissioners, having assembled in this city in conformity with your orders under date of 29th of July, beg leave respectfully to report—

That the extent of country and the great length of the boundary line included in the objects of their commission would have rendered it impossible to have completed the task assigned them within the limits of a single season. In addition to this physical impossibility, the work of the present year was entered upon under circumstances very unfavorable for making any great progress. The law under which they have acted was passed at the last period of a protracted session, when nearly half of the season during which working parties can be kept in the field had elapsed; and although no delay took place in the appointment of commissioners to carry it into effect, the organization of the board was not effected, in consequence of the refusal of one of the commissioners and the agent to accept of their nomination. The commissioners, acting under these disadvantages, have done all that lay in their power to accomplish the greatest practicable extent of work, and have obtained many results which can not but be important in the examination of the vexed and important question which has been committed to them; but after having fully and maturely considered the subject and interchanged the results of their respective operations they have come to the conclusion that it would be premature to embody the partial results which they have attained in a general report for the purpose of being laid before the political and scientific world. The meridian line of the St. Croix has not been carried to a distance of more than 50 miles from the monument at the source of that river, and the operations of the other commissioners, although they have covered a wide extent of country, have fulfilled but one part of the duty assigned them, namely, that of exploration; while even in the parts explored actual surveys will be necessary for the purpose of presenting the question in such form as can admit of no cavil. In particular, the results of the examination of the most northern part of the line appear to differ in some points from the conclusions of the late British commission. Satisfied that the latter have been reached in too hasty a manner and without a sufficient time having been expended upon comparative observations, they are cautioned by this example against committing a like error. In respect to the argumentative part of the report of the British commissioners, the duty of furnishing a prompt and immediate reply to such parts of it as rest upon the construction of treaties and the acts of diplomacy has been rendered far less important than it might at one time have appeared by the publication of the more important parts of the argument laid before the King of the Netherlands as umpire. This argument, the deliberate and studied work of men who well understood the subject, is a full exposition of the grounds on which the claim of the United States to the whole of the disputed territory rests. It has received the sanction of successive Administrations of opposite politics, and may therefore be considered, in addition to its original official character, as approved by the whole nation. To this publication your commission beg leave to refer as embodying an argument which may be styled unanswerable.

The operations of the parties under the command of the several commissioners were as follows:

The party under the direction of Professor Renwick left Portland in detachments on the 26th and 27th of August. The place of general rendezvous was fixed at Woodstock, or, failing that, at the Grand Falls of the St. John. The commissary of the party proceeded as speedily as possible to Oldtown, in order to procure boats and engage men. Professor Renwick passed by land through Brunswick, Gardiner, and Augusta. At the former place barometer No. 1 was compared with that of Professor Cleaveland, at Gardiner with that of Hallowel Gardiner, esq.; and arrangements were made with them to keep registers, to be used as corresponding observations with those of the expedition. At Augusta some additional articles of equipment were obtained from the authorities of the State, but the barometer which it had been hoped might have been procured was found to be unfit for service. At Houlton two tents and a number of knapsacks, with some gunpowder, were furnished by the politeness of General Bustis from the Government stores.

The boats and all the stores reached Woodstock on the 3d September, and all the party were collected except one engineer, who had been left behind at Bangor in the hopes of obtaining another barometer. A bateau was therefore left to bring him on. The remainder of the boats were loaded, and the party embarked on the St. John on the morning of the 4th of September. This, the main body, reached the Grand Falls at noon on the 8th of September. The remaining bateau, with the engineer, arrived the next evening, having ascended the rapids of the St. John in a time short beyond precedent. On its arrival it was found that the barometer, on whose receipt reliance had been placed, had not been completed in time, and although, as was learnt afterwards, it had been committed as soon as finished by the maker to the care of Major Graham, the other commissioners felt compelled to set out before he had joined them. The want of this barometer, in which defects observed in the others had been remedied, was of no little detriment.

A delay of eighteen days had occurred in Portland in consequence of the refusal of Messrs. Cleavelaud and Jarvis to accept their appointments, and it was known from the experience of the commissioners sent out in 1838 by the State of Maine that it would require at least three weeks to reach the line claimed by the United States from Bangor. It was therefore imperative to push forward, unless the risk of having the whole of the operations of this party paralyzed by the setting in of winter was to be encountered. It was also ascertained at the Grand Falls that the streams which were to be ascended were always shallow and rapid, and that at the moment they were extremely low, so that the boats would not carry more stores than would be consumed within the time required to reach the region assigned to Professor Renwick as his share of the duty and return. It became, therefore, necessary, as it had been before feared it must, to be content with an exploration instead of a close and accurate survey. Several of the men employed had been at the northern extremity of the meridian line, but their knowledge was limited to that single object. Inquiry was carefully made for guides through the country between the sources of the Grande Fourche of Restigouche and of Tuladi, but none were to be found. One Indian only had passed from the head of Green River to the Grande Fourche, but his knowledge was limited to a single path, in a direction not likely to shed any light on the object of the commission. He was, however, engaged. The French hunters of Madawaska had never penetrated beyond the sources of Green River, and the Indians who formerly resided on the upper waters of the St. John were said to have abandoned the country for more than twelve years.

The party was now divided into four detachments, the first to proceed down the Restigouche to the tide of the Bay of Chaleurs, the second to ascend the Grande Fourche of Restigouche to its source, the third to be stationed on Green River Mountain, the fourth to convey the surplus stores and heavy baggage to Lake Temiscouata and thence to ascend the Tuladi and Abagusquash to the highest accessible point of the latter. It was resolved that the second and fourth detachments should endeavor to cross the country and meet each other, following as far as possible the height of land. A general rendezvous was again fixed at Lake Temiscouata.

In compliance with this plan, the first and second detachments ascended the Grande River together, crossed the Wagansis portage, and reached the confluence of the Grande Fourche and southwest branch of Restigouche.

The first detachment then descended the united stream, returned by the same course to the St. John, and reached the portage at Temiscouata on the 7th October. All the intended objects of the detachment were happily accomplished.