Weekend trip to Copenhagen. I used the oportunity to sketch on the ferry during our crossing from Aarhus to Sjællands-Odde.
I had time enough to sketch in pencil and ink, and clean up my page a bit. Watercolour was added later from memory, aided by a rather blurry and under-exposed camerphone snapshot.
Do you take notes on colour or use a snapshot for reference when adding colour later? I do either, depending on the scene and how much time I have available.