For anyone interested in the hymn itself:

The original "Olney Hymns" (by William Cowper and John Newton), published in 1779, several printings and editions, was reproduced in facsimile, first released in 1979, by the Cowper and Newton Museum.
Arranged in three books by Newton, are the many hymns by him and William Cowper. American editions began in the 1780s.
Genie posted Newton's original words to Hymn 41 Book 2 (first words Amazing Grace,) in thread 6791, 13 Sept 02: Hymn 41 Amazing Grace

The DT version put's together Newton's first three verses with three others (by Walker?, dropping Newton's last three; in any case it is not the original.