I found these hieroglyphs: at the end of the prologue of the book in Spanish, so I do not know if they appear in the original or another versions. It is on page XVII of this specific edition: https://www.amazon.com.mx/G%C3%83del-Escher-Bach-Douglas-Hofstadter/dp/8490660697
And my very natural question is... what they mean? and what "language" is this? Is original from the book or an old writing? I tried to translate with Google image translator but it does not work.