It could be Cedric Wright, I've had a quick look through several of the Ansel books that I have and he is credited with a number of photographs of Ansel and the "woody" is included. Unfortunately I cannot find this one and I have to pick up some friends in the next 10 minutes. I'll have a look later in the day to see if I can find this image in my books.
"Digital circuits are made from analogue parts"
Fourtune Cookie-Brooklyn May 2006