Elliott Coues 1878 <p>The following notes result from observations made in the field during my connection with the United States Northern Boundary Commission_ Archibald Campbell, Esq., Commissioner, Major W.J Twining, Corps of Engineers, U.S.A. Chief Astronomer. &nbsp;The line surveyed by the Commission in 1873 and 1874 extended from the Red River of the North to the Rocky Mountains, a distance of 850 miles, along the northern border of the Territories of Dakota and Montana, in latitude 49&deg; north.</p> application/pdf 10.3133/70159117 en U.S. Geological Survey Field notes on birds observed in Dakota and Montana along the forty-ninth parallel during the seasons of 1873 and 1874 reports