Possible Clues:

• Setback destroying pleasure - university admission denied
• Picking up fruit-tree I left to fall back
• He's more ashen but Henry's denied upsetting medical problem
• A leper's dire deterioration
• Fall back (into ill health)
• Slide back to see how animal drinks in a lough
• Deterioration, but I left fruit-tree up
• Fall off the wagon again
• Lighter turns, having emptied space, to go back
• Disappointing return