Read it through once

“I am quite sure of him,” replied Jekyll; “I have grounds for certainty that I cannot share with any one. But there is one thing on which you may advise me. I have—I have received a letter; and I am at a loss whether I should show it to the police. I should like to leave it in your hands, Utterson; you would judge wisely, I am sure; I have so great a trust in you.”