We have listed Historical Societies in WA so if you are looking for one come to http://www.headstonesgenealogy.com/recommended_sites.php and see if we have what you want.
 If you know of one we do not have and would like us to add it to our list please contact us with their URl at http://www.headstonesgenealogy.com/contact.php . We hope this will help you find what you are looking for.