Here are two pages drawn on two different days, but I liked how they came together on the spread. For the sketch on the left, I used a felt-tipped pen to capture the individual, whom was holding onto a pole on the train, and I ended up sketching the line for the pole into the crease of the spine down the middle of the spread. Later in the day, I quickly sketched some cars behind him while I was sitting at a cafe. The individual on the right was sketched with a fountain pen. Overall, it looks like the both of them could have been on the same train, on the same day.