How is Dr. Mortimer knowledgable? Please include evidence from the text that supports that.

Mortimer is a well respected doctor, and he was in charge of Sir Charles' care.

“It was at my advice that Sir Charles was about to go to London. His heart was, I knew, affected, and the constant anxiety in which he lived, however chimerical the cause of it might be, was evidently having a serious effect upon his health. I thought that a few months among the distractions of town would send him back a new man.?