click to enlarge
Image 1905-1908Madrid-06-130 
Illustration No. 1     
Illustrator José Jiménez Aranda 
Engraver  
Lithographer  
Title Caption ... de pechos sobre su asno con la mano en la mejilla.... «sábete, Sancho, que no es....» 
Title Supplied  
Part Part I, Madrid 1605  
Chapter Chapter 18 
Subject  
Illustration Type Chapter illustration
 
Technique Process / Photomechanical technique
 
Color Black and white 
Volume II LÁMINAS 
Page Number CAP. XVIII. - 26. 
Image Dimension 151 x 220 
Page Dimension 238 x 312 
Commentary "... stood leaning over his ass with his hand to his cheek.... «Bear in mind, Sancho, that...»".
Sancho angry/sad and thoughtful leant over his donkey while don Quixote approaches from the background with Rocinante.
Masterly image of both characters, specially Sancho.
Jiménez Aranda's drawing skill is masterly; remarkable use of light and shadow with impressionist effects. 
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.
2 - "... y debe contarse entre las mejores figuras la de Sancho puesto de pechos sobre su asno..." (José Ramón Mélida: “Don José Jiménez Aranda y su "Quijote"", vol. I TEXTO, p. XLVI).