I read this book between 1958 and 1964. Here is what I remember about it  a youth-oriented novel (there was no category of Young Adult in those years)set in Oregon in the 19th century.Involved a young boy who was a drift in some way and got involved with trees included the word “Yus,” in place of “Yes,” as a dialectical expression may have had a reference to tall fir trees in the title.

I have searched for this book on the Internet quite a bit, without result.  It is a very good book that I have wanted to recommend to kids, but I could not!!