Nice Pics! I am NOT going to
"Pooh-Pooh" the first photo you posted. If you say that you are sure that the Cam Strap was securely out of the frame, and that you cleaned your lens thoroughly, then I have NO REASON to doubt you. Whatsmore, I can't offer an explanation.
As for the second pic; in it I actually see something that looks simular to The Shadow Creatures that I encounter constantly. However, I
DO NOT BELIEVE that
TRUE Shadow People are either Spirits or Ghosts as we know them. Furthermore, I don't believe that
"Shadow Boogers" are necessarily attracted to Human Spirits OR Human Remains, infact, I don't believe that they're attracted to
ANYTHING HUMAN at all! This is something ELSE!!! SOMETHING DIFFERENT!!!!
It might be a trick of light, or a shadow on the ground, a pocket of Methane Gas, (though that would be rare, as it appears that these graves have been there far too long to have Methane still emitting from them,) a bad frame on your roll of film or even a fault in the developing process of the pics. However,,,on the other hand,,,It might be a ghost, spirit or other entity.
It's hard to say, pictures DON'T ALWAYS speak a thousand words anymore,,ya' know what I'm saying.