The creature is indeed a biped and even has human feet (but the mouth of a tortoise).
Initial ‘P’ from the Moralia in Job (above) is perfect to illustrate the famous dictum by Bernard of Clairvaux: “deformis formositas ac formosa deformitas" (deformed beauty and yet a beautiful deformity).
What I do know is:
This is plate XXXVI from Divina Proportione.
Divina Proportione has only recently been scanned by Archive.org.
The woodcut is said to be after a design by Leonardo da Vinci.
Below the drawing is the text “Vigintisex basium planum vacuum” (twenty-six open faces).
I’ve posted it before.
Next to the engraving (top to bottom) is something which ends in “epipedon cenon” (that is certain) and appears to be “icosidodecahedron” (this is uncertain).
Just imagine what Ubu’s “false portrait” might look like!
This is the only room in that house which is not in the minimalistic De Stijl style. Photo by Dutch artist Paul Citroen.
It’s surprising that are few photos of Jarry, inventor of ‘Pataphysics and the character Ubu Roi.
After all, Jarry’s era was the age of photography. There are more photos of Lautrec for example, who was born ten years earlier and died earlier too.
There is something in this photo that reminds me of Saut dans le vide by Yves Klein.
Incidentally that photo of Yves Klein also features a bicyclist, seen from behind. It’s almost as if Jarry cycled out of this frame, took the first on his right and ended up sixty or seventy years later in a photo by Yves Klein.