what's the task exactly? a mindmap of potential found texts or what?
if so: write 'physical journeys' in the centre of the page, draw evenly spaced branches for how ever many texts you need, and then off THOSE branches have stems with details: composer, text type, a few points on what it's about, and whether you think it would have enough depth to write a quarter of an essay on. You could also draw linking lines to texts that mesh well together, in different colours, if you wanted to go that far. It's still pretty early in the course though, eh.