Answer:
worried
Step-by-step explanation:
Mr. Utterson is a character from " The Strange Case od Dr. Jakyll and Mr. Hyde" and a good friend of protagonist, Dr. Jekyll.
First excerpt shows him completely carefree, taking a relaxing walk with his friend, Mr. Enfield.
In second excerpt, we see signs of restlessness caused by a sudden realization that his friend, Mr. Jekyll is somehow connected and possibly endagered by Mr. Hyde.
Finally, the third excerpt, shows Mr. Utterson in "sombre spirit" which menas he is very sad, serious or in deep thoughts.