SOURCE OF ST. PETEr's RIVER. 251 



Michigan, are diJ3erent from the representations usually 

 given of them in other maps, which uniformly make the 

 difference of latitude between Mackinaw and Fort Howard 

 much too great; the actual difference, agreeably to the best 

 information we could obtain in relation to the subject, be- 

 ing only about one degree. The alteration is to be attri- 

 buted principally to this circumstance. 



The delineations of that part of the Mississippi, situated 

 above the Falls of St. Anthony, are copied from Pike's 

 map of that river ; those of the western part of Lake Su- 

 perior, and the eastern part of Lake Huron, from Bou- 

 chette's Map of Upper and Lower Canada. 



For a sketch of the surveys made in Michigan territory, 

 from which we have made our delineations of the country 

 along the west side of the straits between Lakes Erie and 

 Huron, we are indebted to the politeness of Mr. H. S. 

 Tanner, whose excellent maps of New York, Pennsylva- 

 nia, Ohio, Indiana, and Illinois, we have consulted for in- 

 formation relative to the older parts of the country tra- 

 versed by the Expedition. 



To Dr. Bigsby, an English gentleman attached to the 

 British commission for determining the boundary between 

 the United States and the British possessions, we are much 

 indebted for various items of geographical intelligence, re- 

 lative to Lake Superior, Lake of the Woods, and the in- 

 tervening country. 



The southern coast of Lake Superior, together with the 

 rivers, lakes, &c. situated between that lake and the Mis- 

 sissippi, has been delineated almost entirely from informa- 

 tion kindly imparted by H. R. Schoolcraft, Esq. 



The route of the Expedition is designated on the map 

 by dotted lines and asterisks, the latter of which represent 

 our places of encampment, and have the date annexed. 



