Humptulips
ArboristSite Guru
Check out this link for a lot of pictures of modern equipment in that era.
http://www.steaminthewoods.com/
My favorite is the Hume-Bennett/Sanger LCo. I have been to Hume lake, it is a beautiful camp/retreat area now. It is located in some of the most awesome country I have ever seen.
Thanks for that link. Great pictures. I spent all afternoon looking at them.