Of course, _on_ a boulder. That was just a typo. I wasn't sure about the phrase «For some more hours I did something». Is ok or not?
In the second question I was in doubt about the word order in the clause: «near which I had lain down». Should it be «which I had lain down near» or both the variants are correct?
lied->lain — Heh, I even didn't think of it. Thanks.