"A Journey into the Interior of the Earth"
I read this version of "Journey to the Center of the Earth" last year and I think it's the best version of the story.
According to the redactor's note:
The following version of Jules Verne's "Journey into the Interior of the Earth" was published by Ward, Lock, &Co., Ltd., London, in 1877. This version is believed to be the most faithful rendition into English of this classic currently in the public domain.
You can find this version at The Project Gutenberg here: https://www.gutenberg.org/ebooks/3748
Enjoy!