I once lived in a house that had a huge garden with an odd rectangular indentation in it. I came to find out that many years back, this rectangle had been a pool, in which the gardener had tragically drowned. And so the family filled it in. I remember thinking that it was a pity to no longer have a pool in such a large garden, but really what else were they to do? I guess that the visage of the gardener would forever lurk in the depths of the deep end. What is the protocol in this situation? Can you drain the pool of its deathly water and then fill it with fresh? Or leave the outlines of the space that took his life, filled with soft soil forever.