My sketchbook finshed and I hadn't yet replaced it with a new one, when I searched my bag for paper, then I found these cardboard offcuts in my bag, must have got them from my wife who designs hand made cards . It turned our to work well with the biro I use and the cardboard retained the felt marker very well. As I was sketching this man, one guy by my side felt so entertained through out the process, that when we both got down at Belvedere, he said, "It's good,... what you are doing!" I actually knew he was looking all the way from Westcombe Park but sometimes I just ignore people and get on with the business...