[Dr. Drib]

You should also look at the William Butcher translation, which is a scholarly edition with an introduction and notes by the translator. This edition is published by Oxford University Press.

As William Butcher notes, "This translation is an entirely original one, benefiting from the most recent scholarship on Verne and closely following the French text."

The Baen edition, rather, appears to be an older translation with updated notes to include some text.