what circumstances are associated with the sinister building Mr. utterson and Mr. Enfield note on their walk?

Mr. Utterson and Mr. Enfield are taking a stroll. They pass by a prosperous street and notice a derelict building that looks out of place. The sight of this building gives Enfield the idea to relate his story of the creepy man who knocked a little girl over near the building. When finally threatened to make amends, the very strange man (Mr. Hyde) went into the building and produced a check. The building will feature later in the story as Mr. Hyde's abode.

Oh yes, the check and signature turns out to belong to none other than.....Dr. Jekyll.

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