“Amazing Grace” is sung to the tune New Britain, first printed in 1835 and long in the public domain — and it is close to the perfect first campanella arrangement. The melody is purely pentatonic (five notes, no half steps), it moves patiently, and its long syllables are exactly where campanella’s overlapping sustain earns its keep: maz- rings into -ing, grace hangs in the air over the note that follows.
Playing it
The arrangement sits the tune in C, starting from the open reentrant G — the pickup note is literally free. From there the fingering hops between the fourth and first strings so that nearly every pair of neighboring notes overlaps; the third phrase (“I once was lost…”) climbs highest, touching the twelfth fret before settling home. Take that phrase as its own practice loop before you join the four phrases together. There is no rhythm notation here on purpose: you know exactly how this melody goes — play the columns in order and let your ear supply the timing, holding the long notes as long as the song wants them.
Where it leads
Because the tune uses only the C major pentatonic, every note also lives in the C major pentatonic maps — compare the two and you will see the arrangement is just the scale, curated into a melody. When it rings evenly, try it again slower and quieter, letting the open strings do the sustaining; then move on to Ode to Joy for stepwise motion, or spice the ear with the minor-key Greensleeves.