Self-tattooed man on the northern line

I saw this man asleep as soon as I got on the train, he was wearing a white nylon tracksuit and had his hands folded over his bulky belly. He had several self inked tattoos including one that said "Dee" written at an odd angle down his thumb. I hesitated before taking out my sketchbook as he appeared to stir often and looked slightly dangerous. I overcame the possibility of him waking to find me staring intently at him by drawing into my sketchbook which had been carefully placed inside my handbag. I figured I could shut it in there if I needed to make a fast getaway.