"The Bravery of the English Common Soldiers" http://books.google.co.uk/books?id=5L9GAAAAcAAJ&pg=PA306&dq=%22Liberty+is%22&hl=pt-PT&sa=X&ei=QMMqU_f7MMPMhAeAwoC4DA&redir_esc=y#v=onepage&q=%22Liberty%20is%22&f=false. Note: This essay was "added to some editions of The Idler, when collected into volumes, but not by Dr. Johnson" — vide The Works of Samuel Johnson, Vol. 2 (London, 1806), footnote http://books.google.co.uk/books?id=uYPfXTOfTTsC&pg=PA427&dq=%22This+short+paper%22&hl=pt-PT&sa=X&ei=DcgqU_PlN_Ha0QXQyoDoAw&ved=0CGIQ6AEwBjgU#v=onepage&q=%22This%20short%20paper%22&f=false on p. 427