Question

Although the messenger is unfamiliar to Lanyon, who do we know this to be? How do you know?

Answer 1

We know more than Lanyon,

Step-by-step explanation:

of course, and instantly realize that the small man who strikes Lanyon with a “disgustful curiosity” can be none other than Hyde.

Hyde is the messenger that comes to meet Dr. Lanyon in the middle of the night. He is impatient and insistent that he be allowed to access the drawer as soon as possible.