That river in Egypt

Damocles was on his daily walk, scanning the ground for pieces of metal for him to pick up. He was looking for screws, nuts, washers, any good metal but bolts were his favourite. His pockets were jingling with todays harvest already, things were good. The best places to find screws was around active construction sites. Workers don't care to pick up whatever little pieces they drop, they are free for the taking.

Out of the corner of his eye, he spotted a beautiful piece of rebar. It was magnificent, and beside it lay another 4 pieces. He had never stumbled upon such an amazing find, this really couldn't be beaten. It was a glorious sight. They were the perfect size too, just exquisite. There was but 1 problem... they were on somebodies property.