values study finished

i think i finished it, it took me about 12 hours to make the whole drawing, and there even are parts where i now i didn't do ok, or that i could correct, but for a school excersie is already a little too much. thinking of the bunch still ahead waiting to be done...hmmm, i'd better leave this one alone.

Original image belongs to Tisi Garofalo - "Mother and child with two saints" I think could be a translation for its name)