> 2. the stain might end at the level of the
> original floor which may have been several inches
> higher than the currently exposed floor.
Just browsing through this thread, now my question is a bit off topic but just wanted to hear why you think there was an "Original" floor of several inches higher .
What is the basis for your assertion ?
We might have broached this specific sometime back , but clearly ive forgotten the conversation, would not a significant change to the chambers measurements throw out all those neatly (assumed) built in dimensional ratios .