Bosch, among other things, was also a great draftsman. It was him – among the Northern European artists – who owned the honor of turning the picture into an independent genre. After leaving about 40 pages of drawings, Bosch surpassed all his contemporaries of his circle. His drawings can be divided into three groups.
Firstly, these are sketch sheets filled with numerous human or fantastic figures – such as the “Grotesque Sketches” sheet. Secondly, it’s sketches for paintings, most often containing compositions from several figures. Finally, thirdly, these are carefully worked out independent drawings.
Almost all of Bosch’s drawings are made with a brush or goose feather and ink and / or bistre – the brown pigment obtained when soot is soiled. Goose feather in those days was almost unknown “tool”; introducing him into a technical arsenal, Bosch pioneered a new tradition. It was picked up by many – including Brueghel and Rembrandt.
Saint Anthony by Hieronymus Bosch 
Self-portrait by Hieronymus Bosch 
Ecce Homo by Hieronymus Bosch 
Concert in the egg by Hieronymus Bosch 
Contour grotesque – Jerome Bosch 
Nest of owls by Hieronymus Bosch 
Marriage in Cana of Galilee by Hieronymus Bosch 
The overthrow of sinners, Visions of the Hereafter by Hieronymus Bosch