In what ways has dr. jekyll changed a year since his first meeting him in chapter 3

Two weeks later, Dr. Jekyll gives a small dinner party, for which, we gather, he is well known, for the narrator refers to it as being "one of his pleasant dinners." Five or six of Dr. Jekyll's old cronies are invited, and among them is Mr. Utterson. As usual, the food is superb, the wine good, and Utterson manages to be the last guest to leave.