Sir James Stephen (1789–1859) described John Newton as “one of the second founders of the Church of England”. Newton lived to the age of 82, spending some fifty years in Christian ministry. More than 30 books of his writings were published during and after his lifetime, including over 1,000 letters, almost 300 hymns (most notably Amazing Grace), numerous pamphlets, and various “fugitive pieces”. Hundreds of his letters appear within biographies of his contemporaries such as William Cowper (1731–1800), Hannah More (1745–1833) and Richard Johnson (1753–1827). He was a mentor and father-figure to many, across denominations, and a catalyst in the foundation of several missionary …
Rouse, Marylynn. "John Newton". The Literary Encyclopedia. First published 16 June 2014; last revised 30 November -1.
[http://www.litencyc.com/php/speople.php?rec=true&UID=3330, accessed 26 April 2015.]