I don't see any mention of a Peter in this description of the discovery: "In 1969 second-hand furniture dealer Fred Washington bought 12 notebooks a trash collector had found in a Houston, Texas, dumpster following a house clearance. That same year, Mary Jane Victor was picking through stuff at Washington’s OK Trading Post warehouse when she happened upon the books. Inside she discovered the work of Charles Dellschau (born Berlin 1830 – died Texas 1923). Sensing she was on to something special, Victor contracted the Art Director of Rice University, Dominique de Menil, who bought Dellschau’s work for $1,500 and exhibited it. Dellschau, a long-dead Prussian immigrant had been ‘discovered’."

Not the same Peter Navarro.

https://www.theatlantic.com/technology/archive/2013/03/charles-a-a-dellschau-dreams-of-flying-the-amazing-story-of-an-airship-club-that-might-never-have-existed/274170/

But, at the end of the day, the club's historicity is thin at best. Peter Navarro, a graphic designer who purchased Dellschau's work after its landfill rescue (and later devoted decades of his life to studying and decodings the texts)

from this: https://flashbak.com/charles-dellschau-the-visionary-artist-found-in-a-dumpster-384316/