This set of 7 gesture drawings was done in a drawing class in 1977.
We were set the task of working to very short poses which our model changed every 1 - 3 minutes. I can't remember the exact time of each pose, but we did many drawings over the 3 hour session.
I used a bamboo quill, a thick water colour brush (though it could have been a large Chinese calligraphy brush), 2 colours - perhaps cobalt a blue and an earth red ink - on cartridge paper. The wash effect was achieve by pre-wetting the surface.
The object was to achieve an economy of mark and line.