What would happen to me when these men discovered my presence?

We needed to know how you had discovered our presence.

Entering the room very softly, I had a view of him before he discovered my presence.

But the Advance reporter had thought the movement meant that his presence was discovered.

What if he discovers her presence here in the castle?

Then he turned from the panel, and Scott thought briefly that his presence had been discovered.

Or, more likely, perhaps another of its kind had discovered its presence and gone up to it.

After killing a police officer, who had discovered their presence, they took a father and his daughter hostage in an apartment building.

If they came too close, and discovered our presence, we captured and killed them.

Unfortunately, while at the fortress their presence is discovered and the trains are stopped.