Last week I was chatting on the emails with Janus Clausen, Curator of the Cirkusmuseet in Denmark. He advised me of a new name for flea circus history, "German Mecanicus called Heinrich Künstler from Sachsen". I quickly found in google books the following newspaper article.
Nurnberger Zeitung 121 from Montag 1 Mai 1843
Transalation thanks to Justin
With authoritarian permission
Heinrich Kuenstler from Saxony arrived here on his journey with a unique curiosity that has never been seen before.
He'll be in town for a few days to present it to a honorable audience for their viewing pleasure in the "Guesthouse under Moonshine" in the Gostenhof, No. 11, one stairway up.
An extraordinary cabinet that consists of 160 trained fleas.
Among many shows these will also be performed:
1.) An English touring car pulled by 6 fleas.
2.) A Russian chaise pulled by 2 fleas.
3.) Two fleas pulling a barrel.
4.) One flea pulling an Italian chaise.
5.) A flea fires a cannon as a cannoneer at last. Additionally it is shown that the fleas are lying in silver chains.
The cost of entry is 12 fr., children pay half.
The fleas can be seen daily from 10-12 before noon and 2-7 in the afternoon.
If somebody doesn't find everything as advertised he'll get his entrance fee back.