Women who shaped the world

I recently got a bit challenging task where the client asked me to prepare 4 additional characters to a WIP project already containing 16 paintings of famous women so, that I had to follow the style of the illustrator, Marija Tiurina. I don't have practice in this kind of style and it's pretty lame to draw with mouse but here they are anyways.

The attachment contains the hi-res version and check the article for the rest of the characters:
http://www.feelunique.com/remarkable-women