1. Observe the three graphs on frog populations in Chapter 151. What story do they tell?
2. Now, look at the diagrams in Chapter 179. What do they suggest? What are the implications of this?
3. Examine the timetable Christopher shares in Chapter 193. What inferences (educated guesses) can
you make about this data?
4. Examine the diagram in Chapter 193 representing the relationship between space and time. What
does the diagram actually say? Why does this diagram matter? What purpose does it serve?
5. What is the significance of the pictures in Chapter 211? What purpose do they serve?

For the curious incident of the dog in the night-time