The line about the hydrogen seems really quite misplaced. Everything about the airship thus far all seemed to point towards its being a heavier-than-air craft... ... What makes less sense is Stickleback's sudden line about it being a gas-filled dirgible, when that's clearly not the case.
Well I thought the same and this was probably a trick to prevent the turncoats from defeating their former master. Oh how convenient, it does have gasbags after all!
Unfortunately, the usual left-wing sensibilities will likely prevail - the Duchess will be killed horribly, arrested or escape into the sunset ranting "I shall return!" and normal service will be resumed, albeit with a new set of henchmen.
The Duchess is much more interesting a character than Stickleback, who's basically a clever crook or another type of criminal pretending to be one. Just for once I'd like to see a technology powered super vigilante actually win, conquer the city and have the criminal bosses' heads impaled on spikes at Traitor's Gate.
Exploring a world like that run by a charismatic but morally ambiguous genius would be far more interesting that the antics of a certifiably evil police-murdering tawdry crook who without his supernatural henchmen would likely be under the turf or in the slammer by now.
Has anybody ever written a Robur style story where the aeronaut / submariner / visionary actually wins? (ISBN or weblinks please)