I had enjoyed that little drawing so much that I decided to try it in watercolours. I used cheap watercolour paper (a block of 100 pages, Goldline, Watercolour Studio Pad, 200g/m2, cold pressed, about A4), but it worked out beautifully, with a Rotring ArtPen (not waterproof) and a new Sennelier travel set (isn't it so dinky?).
I used very little water, as I didn't want the pen ink to bleed all over the lovely colours. I'm delighted with the shading and the little darts of colour.