W. L. Courtney 
Metaphysics of John Stuart Mill [PDF ebook] 

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. That Mr. Mill’s logical and psychological spe culations distinctly raise metaphysical questions is in itself a proof of the reality of Metaphysics. Every system must of necessity rest on the basis of some theory of Consciousness, and Conscious ness brings inevitably in its train metaphysical problems. Even a physiologist like Mr. George Henry Lewes finds, in his Problems of Life and Mind, that the Positive Philosophy must seek to lay, as best it can, the Metaphysical ghost, which is ever starting up with awkward persistence to confront experimental psychology and demonstrated materialism.