The Salish Sea does not appear on official government maps. It is the traditional homeland of the Coast Salish Native People. The sea includes the waterways officially named: Puget Sound, the Strait of Georgia, and the Strait of Juan de Fuca.
Please explore the region with this Google Map.
There is more about the location in this article.
To find Robert Ballantyne, usually he is somewhere near here: Ballantyne on Bowen Island. Your browser may need a plugin from Google Earth to view that site.