They were preeminently plains Indians, ranging from Lake Michigan to the Rocky mountains, and from the Arkansas to the saskatchewan, while an outlying body stretched to the shores of the Atlantic.
"The Siouan Indians"
W. J. McGee
Eastward, there are Athabaskan tribes as far as the coasts of Hudson's Bay; westwards as far as the immediate neighbourhood of the Pacific; and southwards as far as the head-waters of the saskatchewan.
"The Ethnology of the British Colonies and Dependencies"
Robert Gordon Latham
243, 'Saskachewan' amended to saskatchewan.
"The Ethnology of the British Colonies and Dependencies"
Robert Gordon Latham