Lynden Pioneer Museum
 

Whatcom Genealogical Society
 

Center For Pacific Northwest Studies
 

American Museum of Radio - Bellingham
 

Skagit County Historical Society & Museum
 

Sedro-Woolley Museum
 

Anacortes Museum
 

San Juan Historical Museum
 

Jefferson County Historical Society & Museum (Port Townsend)
 

Edmonds - South Snohomish Historical Society & Museum
 

League of Snohomish County Heritage Organizations
 

Historic Seattle
 

Clallam County Historical Society & Museum
 

Washington State Historical Society
 

National Trust for Historic Preservation

Washington Territory Sesquicentennial Website
 

Skagit River Journal
 

Gerdrum House, Black Mountain Forestry Center
 

Lake Whatcom History
 

Coal Mining in Bellingham
 

Henry Custer and the Boundary Survey (1857)
 

San Juan Sheep War aka Pig War
 

Blaine Heritage Association article
 

History Link (A great source for Washington History)