Possible Clues:

• Sounds as if I perceived how ugly this was
• Not a pretty sight
• Sounds as if I perceived how hideous this is
• Sounds as if I perceived how hideous it was
• Junk pile, say
• Sight that's a blight
• A dilapidated house, e.g.
• The writer dictated notes? It offends the pupils
• An ugly thing
• Ugly sight, not nice to see