James Freeman Clarke 
Self-Culture Physical, Intellectual, Moral, and Spiritual, a Course of Lectures [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. A boy begins to go to school, say at seven years of age; and he leaves college, say at twenty-one years. He has then spent fourteen years in study.