CHAPTER XIII.

On Energy and Ambition as Affected by the Opium Habit 98

CHAPTER XIV.

Opium versus Sleep.--Manner of Taking Opium.--Different Considerations Relating to the Habit.--A Prophetic Warning 105

CHAPTER XV.

Difficulties of Writing this Book.--An Attempt to Renounce Opium in the Later Stages of the Habit Described.-- Coleridge and De Quincey.--Animadversions upon De Quincey's "Confessions" 115