Focus on this artwork and explain the Sources of the Manga.
The traditional view holds that, after the outburst of production, Hokusai carefully selected and redrew the sketches, arranging them into the patterns we see today. However, Michener (1958:30-34) argues that the pattern of the images on a particular plate were arranged by the wood carvers and publishers, not by the artist himself.
Manga Hokusai sketches