Possible Clues:

• A word from Mary, coming from the heart
• French city whose burghers were sculpted by Rodin?
• Northern French port
• Strait of Dover city
• French Channel port
• French city near a Chunnel terminus
• French port for ferry to England
• French port opposite Dover
• Pier at which Mr Turner, like Mr Piper, was 'pretty unlucky with the weather'
• A ferry port in northern France