May it please your excellency: In obedience to your excellency's instructions, communicated to me through the advocate-general in the absence of the attorney and solicitor generals, I have now the honor to report for the information of your excellency that I proceeded with the least possible delay to the Madawaska settlement. On my arrival at the Great Falls, 130 miles from hence, I was informed the American citizen Ebenezer S. Greely had passed up the day previous for the purpose of again proceeding with the census of the inhabitants of Madawaska under authority from the State of Maine. Aware of the probable excitement that would naturally arise between the two governments from this circumstance, and at the same time fully convinced that His Majesty's Government would but regret any unnecessary misunderstanding during the pending negotiation, I thought it advisable to call upon Mr. Coombs, a magistrate residing 12 miles above the Falls, and request him to accompany me, which he readily did, to witness the conversation between Mr. Greely and myself. We then proceeded and overtook Mr. Greely a short distance above Green River, about 24 miles from the Falls, having ascertained by the inhabitants, as he passed up the river, that Mr. Greely was the whole of the previous day employed in taking down their names, number of each family, and stating they would shortly receive from the State of Maine a sum of money not exceeding $3 for each head of family out of the surplus revenue of the United States. I required Mr. Greely to show me his instructions for exercising authority in Madawaska, when he handed me a document, a copy of which I beg to inclose your excellency, and after perusing the same I returned it with my opinion that I really thought he (Mr. Greely) had mistaken the intention of his instructions, as no allusion was made either to that settlement or the territory in dispute, and therefore if he would then desist in taking the census I would take no notice of what had passed. Moreover, in reply to my advice and request, he (Mr. Greely) remonstrated and attempted to make it appear that he would be fully borne out by his government in what he had done, and it was also his intention to complete the census if he was not prevented; this reply I regret having left me no alternative but to make him a prisoner, which I did on Wednesday, the 7th instant. On Friday evening I arrived in Frederickton, and this morning (Saturday), by the advice of the advocate-generals, I committed him to the gaol of the county of York. I have the honor to be, your excellency's most obedient, humble servant, J.A. MACLAUCHLAN, _Warden of the Disputed Territory_. STATE OF MAINE, EXECUTIVE DEPARTMENT, _JUNE 19, 1837_. His Excellency MARTIN VAN BUREN, _President of the United States_.