Two secret agents, Stephens and Stevens, have a very odd way of communicating with each other: by hiding messages in baffling verse.
One day, they meet covertly on a park bench and Stephens utters the following
In what hell Pharaoh entertains,
With reason vanished, mayhem remains,
Expect no sounds to issue from town,
Keeper of magic, expel seven down.
Much tidings unused to rectify slight,
I move to envisage alternative night,
Some glass under foot uncovers your lie,
A meandering river of sayings to live by.
It is known that Stephens is looking for somebody and Stevens knows where that person is. Beyond that, we don't know anything.
Who is Stephens looking for?
Where is that person?
KeyboardWielder has the right idea in looking for a subtle hint in the names (although it is a different idea to what was suggested). There is also a complementary hint in the first line of the puzzle.