"Dr Jekyll Was Quite At Ease" Chapter 3 Question

Jekyll reassures Utterson when he tells him that if the time or situation warrants, he can get rid of Hyde at any time.

"My good Utterson," said the doctor, "this is very good of you, this is downright good of you, and I cannot find words to thank you in. I believe you fully; I would trust you before any man alive, ay, before myself, if I could make the choice; but indeed it isn't what you fancy; it is not as bad as that; and just to put your good heart at rest, I will tell you one thing: the moment I choose, I can be rid of Mr. Hyde. I give you my hand upon that; and I thank you again and again; and I will just add one little word, Utterson, that I'm sure you'll take in good part: this is a private matter, and I beg of you to let it sleep."