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. Other footnotes, elucidative of various points in the Introduction, have been taken from the three volumes of the Opus Majus. (these are denoted by the reference Op. All the additional footnotes, including the editorial ones, have been placed within brackets to distinguish them from Dr Bridges' footnotes to the Introduction.