The most logical conclusion one can draw from the information is, Williams’s patient was concerned and troubled.
Explanation:
Daniel Hale Williams was a well known American surgeon who is also known for his first successful pericardial surgery.
The author writes that, ‘Williams “reassured the patient with his calm, dignified manner.’ Reassuring some means to say things which removes the doubts of a person. And Williams reassured his patient very calmly. And this was done because William’s patient was concerned and troubled about his health, because of which William have given him the reassurance that everything will be just fine.
