We're now into Volume 7. Frank is battling Thugs. And what vehicle has he this time?

Nobody but a man with brains couldhave made it.

I've no idea why it's called the Fakir. In case you're curious, it sinks at the end when one of the plates ruptures, and it's lost in 20 feet of Indian mud. Frank's a bit sad, but soon throws himself into designs for a new airship at the end.

As usual, the adventures, including travel, takes about seven weeks. Yet somehow he'll have an airplane built by next month.