Yes, Paul, I have something to add. It does not, I fear, provide proof for Horace Sykes’s photo being taken in the Yakima Canyon between E’burg and Selah. But it’s the closest rock/hill/river structure on “my” stretch of river.
This rock painting of Pacman graces a popular fishing/swimming spot several miles from the E’burg end of the canyon. The landscape is similar to Horace’s but I don’t think it’s the same.
Paul here: But a lovely coincidence made nearly uncanny with those obscuring trees.
And here’s a photo I found in searching my archives – taken when the sun was setting from a cliff overlooking the river about midway through the canyon. No connection to Sykes, but Paradis shot this paradise which we include in our book.