Possible Clues:

• Pioneering Canadian physician, Sir William ___
• William ___, the Father of Modern Medicine
• Sir William ____ ( Canadian physician )
• Sir William who wrote 'The Principles and Practice of Medicine'
• Knighted physician William
• Medical pioneer Sir William
• Physician Sir William
• Author of today's quote
• Dr. William ___ (Medical visionary born 1849)
• Sir William ___, so-called 'Father of Modern Medicine'