Underpainting: A Hypothesis

The image below shows a reasonable hypothesis of Vermeer's underpainting as conceived by the author of this site, Jonathan Janson.

Underpainting of Girl in Hyacin th Blue, Jonathan Janson
Girl in Hyacinth Blue (unfinished)
Jonathan Janson
2002
45 x 40 cm.
Hallmark art collection, St. Loius