The Indian Tribes on Vancouver Island and on the Coast of British Columbia Based on his own research, Dr. Franz Boas
Boas, Dr. Franz - Boas, Dr. Franz (1887). Zur Ethnologie Britisch-Kolumbiens [Monograph]. Dr.A.PETERMANN'S MITTEILUNGEN AUS JUSTUS PERTHES' GEOGR.ANSTALT 1887, 33, 129–133, 161
The main map uses colour-coded shading to delineate tribal territories — yellow for Kwakiutl tribes, pink for Salish tribes, and green for West Vancouver tribes — with dotted lines marking sub-group boundaries. Three inset maps (Karton A, B, and C) provide detail of northern and eastern areas. Tribal names are densely labelled across the coastal and inland regions. A legend (Erklärung) and scale bar appear at lower centre.
https://en.wikipedia.org/wiki/Kwakwaka%CA%BCwakw#/media/File:DIE_INDIANERST%C3%84MME_von_VANCOUVER_I%E1%B4%B0%CC%A3_und_an_der_K%C3%9CSTE_von_BRITISCH-COLUMBIA.jpg