The following question is based on your reading of "dr jekyll and mr. hyde"

what do enfield and utterson suspect about the relationship between jekyll and hyde?

They suspect that Hyde must be blackmailing Jekyll. The text says Hyde "must have secrets of his own."

Enfield and Utterson are confused about the relationship that takes place between Dr. Jekyll and Mr. Hyde. They believe Jekyll to be an outstanding citizen, and therefore, cannot understand why he would want to deal with a person they find undesirable. What they suspect is that Mr. Hyde is blackmailing Dr. Jekyll. They think that Hyde might have information about Dr. Jekyll's past behaviour or adventures in his youth.