Possible Clues:

• Again become invalid or again become an invalid
• Fall back, as leper perhaps
• Deterioration in health due to engineers' mistake
• Fall back into former state
• Climbing trellis I flipped out, to fall back
• Go back to poor condition concerning Northern Europeans reportedly
• Train has no room for one going uphill and going back downhill
• Pleaser may slip to earlier state
• Not a genuine feature of church, to fall into sin
• Fall back on drinks and drug