Practicing with my Hero

Here are a few sketches I did in the last few days with my new Hero calligraphy pen. The first two sketches are from a book called, "Anatomy for the Artist". The other sketch with watercolour was from the wonderful street photographer, Vivian Maier's website. 
No preparation penciling was used for these drawings, I'm trying to push myself to be free with ink and watercolour, trying to lose the fear of making mistakes.