Possible Clues:

• Edouard ---, pre-impressionist
• Friends of Italian optician, astronomer and natural philosopher
• From him one got the impression that it's grand for catching fish
• Frenchman who made quite an impression
• A chap from Paris and an artist
• Encountered without an illustrious artist
• Satisfied, having engaged an artist
• 'Déjeuner sur l'Herbe' painter
• Fellow disheartened expressionist painter
• Olympia artist