Part 2 is on the next page,
Part 3 the page after that.
Here is a "clickable" Table of the available Midi Files for this Work:-
Warning: these Files were prepared from a Vocal Score similar to the main settings of the Peters Vocal Score, which has a slightly different Section Numbering scheme from the various Novello Scores, and wherein the phrasing in some sections - specifically No. 20: Behold the Lamb of God - may not entirely match the various possibilities of the Novello version.
That's the end of Part 1. Part 2 is on the next page
Part 3 is on the page following that.