Complex sentence: The first half is based mainly on the "Soliloquies" of St Augustine of Hippo, the remainder is drawn from various sources, and contains much that is Alfred's own and highly characteristic of him.
Split into simpler sentences: The first half is based mainly on the "Soliloquies" of St Augustine of Hippo, the remainder is drawn from various sources. The material has traditionally been thought to contain much that is Alfred's own and highly characteristic of him.