At the beginning, I need for you to add the correct LibriVox intro. It is in the original post for the project. Here is it...
"Chapter [number] [Part # as appropriate] of Principles of Geology. This is a LibriVox recording. All LibriVox recordings are in the public domain. For more information, or to volunteer, please visit: librivox DOT org"
If you wish, say: "Recording by [your name], [city, your blog, podcast, web address]"
Say:
"Principles of Geology, by Charles Lyell. [Section Title]"
So, for your section, you should say, "Chapter 4 part 1 of Principles of Geology. This is a LibriVox recording. All LibriVox recordings are in the public domain. For more information, or to volunteer, please visit LibriVox DOT org. Principles of Geology, by Charles Lyell." Then what you have is fine after that.
Then, the outro needs to be the proper outro. You need to add, "End of Chapter 4 part 1" then 5 seconds of silence. You will also need to edit out, "Boom, done."