The head and one rib were wanting to one of the skeletons, and the remaining head was placed within the same skeleton, to which it did not belong.
The bones of Adam and Eve had not all been left in this grave, for Noah had some of them with him in the ark, and they were transmitted from generation to generation by the Patriarchs.

Noah, and also Abraham, were in the habit, when offering sacrifice, of always laying some of Adam's bones upon the altar, to remind the Almighty of his promise.

When Jacob gave Joseph his variegated robe, he at the same time gave him some bones of Adam, to be kept as relics.

Joseph always wore them on his bosom, and they were placed with his own bones in the first reliquary which the children of Israel brought out of Egypt.

I have seen similar things, but some I have forgotten, and the others time fails me to describe.
As regards the origin of the name of Calvary, I here give all I know.