click to enlarge
Image 1905-1908Madrid-06-162 
Illustration No. 1     
Illustrator José Jiménez Aranda 
Engraver  
Lithographer  
Title Caption .... tras esto alzó la camisa lo mejor que pudo, y echó al aire entrambas posaderas,.... 
Title Supplied  
Part Part I, Madrid 1605  
Chapter Chapter 20 
Subject 20.4 SP’s mishap (cagada)
 
Illustration Type Chapter illustration
 
Technique Process / Photomechanical technique
 
Color Black and white 
Volume II LÁMINAS 
Page Number CAP. XX. - 7. 
Image Dimension 155 x 200 
Page Dimension 238 x 312 
Commentary "... he then raised his shirt as well as he could and bared his hind quarters...".
At night in a forest, Sancho gets ready to relieve himself; being too scared, he remains next to don Quixote, mounted on Rocinante.
The scene has been resolved without excessive crude humour.
Jiménez Aranda's drawing skill is masterly; the illustration, resolved in almost complete darkness, is worth noting. 
Notes 1 – Reproduction of the original sketch (Chinese ink and gouache white). Jiménez Aranda meant to paint a more-finished drawing after this sketch using natural sceneries and real models, but he died before completing the project.