Amazing Grace is a Christian hymn published in 1779.
Drum Blaster (DOS)
This song came with Version 3.0 only. The filename is AMAZING.CMF and the HELPME.DOC describes it as "Dan's transcription of Amazing Grace".
The file is identical to the one in Onesimus: A Quest For Freedom (DOS), which it was likely made for in the first place, as the HELPME.DOC describes it as "taken from the sound track of Jill of the Jungle".
Onesimus: A Quest For Freedom (DOS)
This is the only track which was not derived from any of the Jill of the Jungle series music. It is likely that AdLib Visual Composer was the tool to compose and later to convert it to CMF via ROL to CMF just the same way as all other Jill tracks were done.
The song plays when you reach the final level, "House of Paul" (level 30).
The file in the game folder is named SONG15.ARK.