1) This is the rough sketch I drew in my little sketchbook so I had a plan of what I wanted. It's a secondary establishing shot, looking down on the characters in the train carriage of a 1920s Northwest Frontier train.

2, 3) Here the panel has been started on the actual page. I started with the figure of Lily first, lightly, then drew in the structure of the environment (three-point perspective on this view), then sketched in the other figures to fit. You can see I changed Lily's pose to cross her legs in (3).

4) As I started some of the environment detail I realised my two figures at the bottom of the panel were not quite placed correctly for the seats. I liked their fairly natural poses, so lightboxed them into my sketchbook, erased them and continued detailing the surroundings.

5) Here you can see I've lightboxed the figures back from the sketchbook and into the scene again, this time placed correctly.

6) Most of the surroundings are in now and there's another slight change to Lily's pose as I give her a water bottle to hold - those carriages get hot! One component missing is the Punjab infantryman's rifle as I needed to get reference for a Mark III Lee Enfield.

7) Here are the finished pencils scanned in, complete with correct rifle.

8) And here is the panel inked.

9) The completed and coloured panel. There's a bit of cheating going on with this scene because the reader's view has to be outside the carriage in order to fit the whole thing in, but you can do that kind of thing with comics!