The children of Israel did so as Joshua commanded, and took up twelve stones out of the midst of the Jordan, as Yahweh spoke to Joshua, according to the number of the tribes of the children of Israel; and they carried them over with them to the place where they lodged, and laid them down there.
"Thus, it is the amazing symbolism of these events, as we found so frequently in Exodus, that bears eloquent and indestructible testimony of the divine nature of this narrative.  It is beyond the power of any man who ever lived to have concocted a story like this, even if he had had one hundred prior sources to help him!  The hand of the infinite God is in every line of this sacred narrative!