For comparison purposes, here is the same ebook as pre-processed by
GuteBook, my free software that anyone can use to create ebooks for their ebook reader. It uses calibre v0.6 to produce the .mobi ebook (or Mobipocket Creator Publisher Edition v4.2
build 40 to produce the .prc ebook) which differs from Patricia's use of BookDesigner to produce her .prc ebook.
It's source was http://www.gutenberg.org/etext/5199 and GuteBook was supplied with just Etext-No. 5199 and options to accomplish this!
This ebook was prepared from the HTML source code as fetched/filtered/fixed by GuteBook and then MANUALLY intervened by me to fix the List of Illustrations images (all images are now included), add styles to center headings, as well as employ some of Patrica's fixes regarding ditto marks and the ASCII whaling chart used in Appendix I.
Gutebook took only a few minutes to download and fix the ebook, but then to get the right look-and-feel, I spent about an hour tweaking things that initially broke under GuteBook. However, when done I could easily re-generate this .mobi/.prc ebook as well as other ebook formats like .epub, .lrf, .lit, and .imp, at the same time.
Enjoy!