I got the bones puzzle first time, but didn't REALIZE I had beaten it. I kept expecting it to make some indication that I had it right. Of course, you have to leave the puzzle, and the description of the bones changes to "dead creature." Definitely not a good design for that puzzle.
I also got stuck the first time because I didn't see the ramp in the first cavern you go into. Other than that, though, it was pretty smooth sailing for me, especially on the second go through (I first played it about 5 years ago).
Hehe, I found my old review of it: http://www.gameology.org/reviews/rev...s_the_dig_1995
I had almost forgotten that I had written that!