longer be desirable for medical use. If families did not have enough money to hire an individual to watch over the grave for a select number of days, the family would delegate this duty amongst them and close friends. As grave robbing became a lucrative business in the 19th century, a bribe would convince some guards to look the other way. In Scotland, construction of guard towers became common in the late 18th century, usually in a position overlooking most of the burial ground. Deception Within the Great Pyramid of Giza (completed around 2560 BC), an Egyptian deterrent system was built to guard the tomb of Pharaoh Khufu. This system consists of blocks and grooves to protect the King's Chamber from tomb robbers. Some experts believe that Pharaoh Khufu's tomb has actually not been found because of the deterrent system; instead, what had been found by grave robbers were fake chambers. See also Body snatching Nighthawking Speyer wine bottle Tomb of Lepejou Treasure hunting Notes and references Notes References Bibliography Peet, T. E. (1930), The great Tomb-Robberies of the Twentieth Egyptian Dynasty, Oxford. Archaeological theft Art and cultural repatriation Looting Property crimes Organized crime activity