Here is a Scrap regarding him, not quite to be thrown away: "Sir Jonas Hanway was not always so extinct as he has now become.
Readers might do worse than turn to his now old Book of TRAVELS again, and the strange old London it awakens for us: A 'Russian Trading Company,' full of hope to the then mercantile mind; a Mr.Hanway despatched, years ago, as Chief Clerk, inexpressibly interested to manage well;--and managing, as you may read at large.

Has done his best and utmost, all this while; and had such travellings through the Naphtha Countries, sailings on the Caspian; such difficulties, successes,--ultimately, failure.

Owing to Mr.Elton and Thamas Kouli Khan mainly.

Thamas Kouli Khan--otherwise called Nadir Shah (and a very hard-headed fellow, by all appearance)--wiled and seduced Mr.Elton, an Ex-Naval gentleman, away from his Ledgers, to build him Ships; having set his heart on getting a Navy.

And Mr.Elton did build him (spite of all I could say) a Bark or two on the Caspian;--most hopeful to the said Nadir Shah; but did it come to anything?
It disgusted, it alarmed the Russians; and ruined Sir Jonas,--who is returning at this period, prepared to render account of himself at London, in a loftily resigned frame of mind.