2. Jekyll is looking “deadly sick”. What other indications do we get of his state of mind?

Interestingly, through Stevenson's detailed description of Jekyll's residence, the reader gains insight into the character's evolution. In the laboratory, Utterson describes "three dusty windows barred with iron." One year previous, Mr. Enfield described the same windows as, "always shut but...clean." This slight detail provides a glance into the tumbling personal world of Dr. Jekyll.

The fire burned in the grate; a lamp was set lighted on the chimney shelf, for even in the houses the fog began to lie thickly; and there, close up to the warmth, sat Dr. Jekyll, looking deathly sick. He did not rise to meet his visitor, but held out a cold hand and bade him welcome in a
changed voice.

The doctor seemed seized with a qualm of faintness; he shut his mouth tight and nodded.