### Clue: He, devil, whose tail unseen, noticed my horribly hellish work (3,6,6)
### Answer: THE DIVINE COMEDY 
 ### Explanation: Definition: hellish work
 **Anagram of**(horribly) [HE + "devil" **minus its last letter**(whose tail unseen) + NOTICED MY].
Answer: The work mentioned in 10,24 above.