1.   Excavations revealed the presence of an ancient burial ground.

2.   Tests revealed the presence of poison in the blood.

3.   Then, with a watchful eye, it can keep a lookout for potential prey without revealing its presence.

4.   Each of us must feel the evocation touching our hearts -- for this is where God reveals his presence among us.

5.   A patch of lights off to the right revealed the presence of a town which slowly orbited them and disappeared into the darkness.

6.   Electron microscopic analysis of the pellet revealed the presence of zymogen granules as well as lysosomes.

7.   Longer film exposure failed to reveal the presence of these fragments in RNA from aorta and vena cava samples.

8.   All types of neutrinos enter the tank, but anti-electron neutrinos leave a unique trail, revealing their presence when they collide with protons in the mineral oil.

9.   Already, the technique has revealed the presence of a rare form of electrically charged molecular hydrogen.

10.   As he spoke, armed Egyptians, Saudis, Algerians and Afghans patrolled the nighttime fields around us, their presence revealed by a single hissing gas lamp.