marking his camps with their dates, along the river, and also his trail, where he went overland; it is believed that this has been done with all the accuracy that a map of this scale permits, except for the route from Leech lake back to the Mississippi, which has never been--and probably never will be--ascertained with all desirable exactitude. Secondly, I intended to give the actual present names of all the natural and artificial features which are delineated; and thirdly, to add to these designations all the synonymy and other historical data which the map could conveniently carry. Though there is theoretically no end to the information of this kind which might be put upon a map, the practical limitations in any given case are obvious; and overcrowded lettering would be rather confusing than helpful to the reader. In general, the historical data which have been selected to be legended are in direct connection with and support of Pike's text and of my commentary thereupon. Only those who have long experienced the practical difficulty of making a good printer or draughtsman misspell words in order to reproduce historical forms literally can appreciate the obstacles to complete success in such an undertaking; but I indulge the hope that this chart, whatever its imperfections may be, will be found useful enough to warrant the great pains which have been taken to approximate accuracy. As in editing Lewis and Clark, so in working upon Pike, I have been encouraged and assisted by many friends, not all of whom have I the pleasure of knowing personally. I am under special obligations to Mr. Alfred J. Hill of St. Paul, Minn., whose knowledge of the history and geography of the Upper Mississippi region is not less accurate than extensive. Mr. Hill has been good enough to accompany me throughout Pt. 1 of the work, and give me the benefit of his close scrutiny of the press-proofs, in the form of constant suggestion and criticism, besides frequent references to other available sources of information which I might have overlooked. His valued co-operation to this extent increases very appreciably the confidence which the reader may feel in all that relates to the Mississippi Voyage.[NP-1] Mr. R. I. Holcombe, county historian of Missouri, now of the U. S. Marshal's office in St. Paul, has criticised those pages of Pt. 2 which relate to the Osage river. The same friendly attentions have been bestowed upon the whole of Pike's route in Colorado by Mr. Wm. M. Maguire of Denver; and upon various points concerning the pueblos of New Mexico and Arizona, by Mr. F. W. Hodge of the U. S. Bureau of Ethnology. Hon. J. V. Brower of St. Paul, Commissioner of the Itasca State Park, has made me free to use his map of the park in connection with the new historico-geographical chart of the Upper Mississippi. The Hon. the Secretaries of War and of State have granted permission to examine official archives of their