Robert Louis Stevenson,
The Annotated Strange Case of Dr Jekyll and Mr Hyde…
“ Guest had often been on business to the doctor's; he knew Poole; he could scarce have failed to hear of Mr. Hyde's familiarity about the house; he might draw conclusions: was it not as well, then, that he should see a letter which put that mystery to right? and above all since Guest, being a great student and critic of handwriting, would consider the step natural and obliging? The clerk, besides, was a man of counsel; he could scarce read so strange a document without dropping a remark; and by that remark Mr. Utterson might shape his future course. ”
