Looks like one laying down resting. Maybe he has arrived. In the lower right photo, you can see a heavy, black "A" and "J" on the side of his jaw, down low.
Yes it looks like one to me, pretty rough hewn, The ones I have seen had rounded corners and since it was laying down or resting I would venture to say that you may be pretty close to something interesting, perhaps the unfinished portion of a windrose or a windrose may be something near-by for instance two symbols that seem to indicate leaving the area but I wouldn't fall for the trick, The things to look for, they would place carvings in a pattern, triangle, square, rectangle, If so measure between them get the degrees look for corners from 95 feet to 200 feet apart, so many possibilities,
shortstack, i have to see carefully if this rock contains more clues .. i will take into account to search letters dsty, for the moment i dont know what to search .. now i have an idea THANKS
.. first clean the place then watch