This rise and fall is found to be concurrent in volume and time in the whole series of lake basins, and is not at all influenced by artificial constructions. It is believed to be dependent on the annual fall of water, on the water sheds of the lake basins, and the comparative evaporation caused by the annual diffusion of solar heat during the same periods. Nothing less than the accumulation of facts to illustrate these general laws, for considerable periods of time, will, it is believed, philosophically account for the phenomena. Tables of solar heat, rain guages, and scientific measures, to determine the fall of snow over the large continental era of the whole series of basins, are, therefore, the scientific means that should be employed before we can theorize properly. As to periodical rises, actually observed, they are believed to be the very measure of these phenomena, namely, the fall of atmospheric moisture, and the concurrent intensity of solar heat between the unknown periods of the rise.

The fluctuations in Lake Michigan and the Straits of Michilimackinack are capable of being accounted for on a separate theory, namely, the theory of lake winds.

4th July. Letters from Detroit show that the political agitations respecting Canada still continue. One correspondent remarks: "The fourth of July passed off here with more apparent patriotic feeling than I have ever known before. Canada is still across the river--the pat-riots have not yet removed any part of it; they are, however, still busy."

Another says: "Times look troublesome, but I am in hopes that it will all blow over and peace continue, which should be the earnest wish of every Christian."

23d. Public business calling me to Washington, I left Mackinack late in June, and, pushing day and night, reached that city on the 9th of July. The day of my arrival was a hot one, and, during our temporary stop in the cars between the Relay House and Bladensburg, some pickpocket eased me of my pocket-book, containing a treasury-note for $50, about $60 in bills, and sundry papers. The man must have been a genteel and well-dressed fellow, for I conversed with none other, and very adroit at his business. I did not discover my loss till reaching the hotel, and all inquiry was then fruitless. After four days I again set out for the North in an immense train of cars, having half of Congress aboard, as they had just adjourned, and reached Mackinack about the tenth day's travel. This was a toilsome trip, the whole journey to the seat of government and back, say 2,000 miles, being made in some twenty-five days, all stops inclusive.

31st. I set out this day from Mackinack in a boat for Lake Superior and the Straits of St. Mary, for the purpose of estimating the value of the Indian improvements North, under the eighth art. of the treaty of March 28th, 1836. The weather being fine, and anticipating no high winds at this season, I determined, as a means of health and recreation, to take Mrs. S. and her niece, Julia, a maid, and the children along, having tents and every camping apparatus to make the trip a pleasant one. My boat was one of the largest and best of those usually employed in the trade, manned with seven rowers and provided with a mast and sails. An awning was prepared to cover the centre-bar, which was furnished with seats made of our rolled-up beds. Magazines, a spy-glass, &c., &c., served to while away the time, and a well-furnished mess-basket served to make us quite easy in that department. At Sault St. Marie I took on board Mr. Placidus Ord to keep, the record of appraisements.

While here, the notorious John Tanner, who had been on very ill terms with the civilized world for many years--for no reason, it seems, but that it would not support him in idleness--this man, whose thoughts were bitter and suspicious of every one, followed me one day unperceived into a canoe-house, where I had gone alone to inspect a newly-made canoe. He began to talk after his manner, when, lifting my eyes to meet his glance, I saw mischief evidently in their cold, malicious, bandit air, and, looking him determinedly in the eyes, instantly raising my heavy walking-cane, confronted him with the declaration of his secret purpose with a degree of decision of tone and manner which caused him to step back out of the open door and leave the premises. I was perfectly surprised at his dastardly movement, for I had supposed him before to be a brave man, and I heard or saw no more of him while there.[87]

[87] Eight years afterwards, namely, in July, 1846, this lawless vagabond waylaid and shot my brother James, having concealed himself in a cedar thicket.

Tanner was stolen by old Kishkako, the Saginaw, from Kentucky, when he was a boy of about nine years old. He is now a gray-headed, hard-featured old man, whose feelings are at war with every one on earth, white and red. Every attempt to meliorate his manners and Indian notions, has failed. He has invariably misapprehended them, and is more suspicious, revengeful, and bad tempered than any Indian I ever knew. Dr. James, who made, by the way, a mere pack-horse of Indian opinions of him, did not suspect his fidelity, and put many things in his narrative which made the whites about St. Mary's call him an old liar. This enraged him against the Doctor, whom he threatened to kill. He had served me awhile as an interpreter, and, while thus employed, he went to Detroit, and was pleased with a country girl, who was a chambermaid at old Ben. Woodworth's hotel. He married her, but, after having one child, and living with him a year, she was glad to escape with life, and, under the plea of a visit, made some arrangement with the ladies of Fort Brady to slip off, on board of a vessel, and so eluded him. The Legislature afterwards granted her a divorce. He blamed me for the escape, though I was entirely ignorant of its execution, and knew nothing of it, till it had transpired.

In this trip to the North, I called on the Indians to show me their old fields and gardens at every point.