Map of the North West Coast during the <a href="https://en.wikipedia.org/wiki/Maritime_Fur_Trade" class="extiw" title="en:Maritime Fur Trade">Maritime Fur Trade</a> era, circa 1790 to 1840. Main sources consulted include: 
<ul><li>Gibson, James R. (1992). Otter Skins, Boston Ships, and China Goods: The Maritime Fur Trade of the Northwest Coast, 1785-1841. McGill-Queen's University Press. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-7735-2028-7" title="Special:BookSources/0-7735-2028-7">ISBN 0-7735-2028-7</a></li></ul><ul><li>Gibson, James R. (1997). The Lifeline of the Oregon Country: The Fraser-Columbia Brigade System, 1811-47. University of British Columbia (UBC) Press. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0774806435" title="Special:BookSources/0774806435">ISBN 0774806435</a></li></ul><ul><li>Haycox, Stephen W. (2002). Alaska: An American Colony. University of Washington Press. <a href="//commons.wikimedia.org/wiki/Special:BookSources/9780295982496" title="Special:BookSources/9780295982496">ISBN 9780295982496</a></li></ul><ul><li>Hayes, Derek (1999). Historical Atlas of the Pacific Northwest: Maps of exploration and Discovery. Sasquatch Books. <a href="//commons.wikimedia.org/wiki/Special:BookSources/1-57061-215-3" title="Special:BookSources/1-57061-215-3">ISBN 1-57061-215-3</a></li></ul><ul><li>Mackie, Richard Somerset (1997). Trading Beyond the Mountains: The British Fur Trade on the Pacific 1793-1843. Vancouver: University of British Columbia (UBC) Press. <a href="//commons.wikimedia.org/wiki/Special:BookSources/0-7748-0613-3" title="Special:BookSources/0-7748-0613-3">ISBN 0-7748-0613-3</a></li></ul>
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