. The source of the Mississippi, comprising, I. Letter from Messrs. Ivison, Blakeman, Taylor, & company, II. - transferred to paper beside this explanation, our explorers alsofound reason to believe that Itasca Lake was atone time several inches higher than it is now ; andif, on the other hand, Elk Lake was once of alower level than now, the two coming togetherwould account for the difference in form theyexhibited in 1836, as compared with their presentoutlines. 6 REPORT OF THE I. B. T. & CO. EXPLORATION According to Mr. Gilfillan, the Indians calledElk Lake, Gabukegurnag, which
. The source of the Mississippi, comprising, I. Letter from Messrs. Ivison, Blakeman, Taylor, & company, II. - transferred to paper beside this explanation, our explorers alsofound reason to believe that Itasca Lake was atone time several inches higher than it is now ; andif, on the other hand, Elk Lake was once of alower level than now, the two coming togetherwould account for the difference in form theyexhibited in 1836, as compared with their presentoutlines. 6 REPORT OF THE I. B. T. & CO. EXPLORATION According to Mr. Gilfillan, the Indians calledElk Lake, Gabukegurnag, which means, waterwhich juts off to one side of another lake ; thatis, branches or projects out from it like a fingerfrom a hand. This would indicate, that, whenthis name was given to it, Elk Lake was simplyan arm or bay putting out from Lake Itasca, andthat with the filling-up of the channel betweenthe two, and the lowering of the level of Itasca,the difference in level, which amounts to only LAKE ITASCA AND VICINITYFrom Capt. Glazier^a large thirteen inches, contributed to make the one lakedistinct from the other, and a feeder to it. RESULTS OK TIUS SURVEY. We may briefly sum up the results of this ex-ploration to be : — 1. Tlie confirming of the accuracy of the government survey. 2. The proof of the general correctness of Nicol- lets report and map. 3. Nicollets creek is still by far the largest afflu- ent of Itasca, con iriba ting about three-fourthsof the regular perennial inflow of water. 4. It can be traced beyond the point to whicli Nicollet followed it to the lake that heads insection 34, Tp. 143 N., R. 36 W. 5th meridian;and at this point it is 92 feet above the levelof Lake Itasca. .>. Following its windings, it is also the longesttributary of Lake Itasca ; and therefore, fi. As the largest and longest tributary stream,and the one most elevated in its source, it isentitled to be called the upper course of theMississippi. 7. Considerable changes hav
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