[ Visually exploring his environment is second nature to Light. Even without the heavy dose of suspicion that he holds for John, he'd have looked for clues to further his understanding of the man he's with. ]

Are these the last men to agree to this deal?

[ His tone isn't exactly harsh. They're in a position of forced partnership so there has to be some kind of agreement to a temporary truce to allow this to flow smoothly. Light trusts he hides his monstrous side better than this. He's the kind of evil who can blend in well with society. Even if they know little about each other, Light can make some deductions based on how L reacts to him. ]

Based on your experience, we'll be freed when we satisfy some kind of condition. It'd have to be notable for something that would be satisfied by accident. You mentioned that it could be as easy as telling each other a secret. Let's test out those theories before moving to something more physical.

So, do you have a secret for me?