The above is correct. It means, arranged or placed horizontally on a surface.We scraped at the earth at the base of the frame and came upon others bones, they 1 were laid out (past form of LAY OUT ?) in a pattern . . . .
Correct. Same meaning as the one above.In the days that followed we 2 laid out (past form of LAY OUT ?) the bones in a shed
"lay" is correct. It's the present. It expresses a fact. How the bones are situated, positioned.I had made a sketch of how they 3 lay (simple past of LIE ? if yes, why not the past perfect ?)
Correct. Same as the one above. It's position, where it lay.Because the skeleton had been twisted where it 4 lay (simple past of LIE ?) in the earth . . . .
Present. Fact. The bird is positioned, like so, on the floor.and still the great bird 5 lay (simple past of LIE ?) stubbornly misshapen on the floor,