Dear tsuwm: I read the book very carefully. Naturally more of his arguments were presented there. I did not find a single argument I could refute. His style unfortunately was a bit reminiscent of some zealots and cranks. And to my satisfaction he anwered any reasonable objction to his theory. Marianna remembers reading a book about one of the blocks being broken open an unmistakeable signs of its having been cast being found. And it explains how the logistics of the casting theory make much more sense than the idea of hauling all those blocks from miles away, hoisting them hundreds of feet up from the river, and hauling them up a slope to final position. I do not see how any reasonable person who read Davidovitz' book could fail to accept his arguments.