The Venerable Bede: Ecclesiastical History - William Hurst translation. Each chapter in its own file, with links to the next. At CCEL. - http://www.ccel.org/ccel/bede/history.v.i.xxii.html
Britannia: St. Augustine of Canterbury - Brief biography. Edited from G.M. Bevan's "Portraits of the Archbishops of Canterbury." - http://www.britannia.com/bios/abofc/augustine.html
The Ecole Glossary: Augustine of Canterbury - Short biography, by Karen Rae Keck. This saint is also called "Austin." - http://www2.evansville.edu/ecoleweb/glossary/akent.html
Augustine of Canterbury, Saint - Short biographical entry in the Columbia Encyclopedia. - http://www.bartleby.com/65/au/AugustnCa.html
Catholic Encyclopedia: St. Augustine of Canterbury - Biographical article on the monk who was the first Archbishop of Canterbury, called "Apostle of the English." - http://www.newadvent.org/cathen/02081a.htm
The Venerable Bede: Ecclesiastical History (Excerpts) - About the conversion of England. Approximately the first half deals with Augustine. At Medieval Sourcebook. - http://www.fordham.edu/halsall/source/bede1.html