Illustrated London News from 1888

I find this illustration fascintating.

It's from a series of illustrations from the Illustrated London News for October 13, 1888. The series is entitled: "With the Vigilance Committee in the East End.". This specific illustration is calledv"A Suspicious Character."

What I find interesting about it are the two characters in the background.   Obviously the on the left represents Jack the Ripper, but the other two remind me very much of Sherlock Holmes and Dr. Watson.