In these pages it says Jemmy sees and hears things that are compared to different parts of nature, like "music as sweet as the sound of the ocean." This is a simile, as it uses a completely different sound to show how sweet sounding it is to Jemmy, to be more descriptive and help us to understand what it is like to him.
This was done in a similar way by the poet Harold M Telemaque, in his poem 'Riches'.
In the poem Harold Telemaque compares valuable gold, silver and diamond to things in nature that have similar colours or looks.
What do you think Jemmy might miss from his home? What 'riches' has he left behind? Try and write your own poem, either about the beautiful things in nature where Jemmy grew up, or the wonderful things he has seen where he lives now. Try an use similes to improve your poem. If you're writing about the jungle, compare things there to valuable things we have in English cities. If you are writing about what Jemmy has seen in England, try and compare it to things he misses from home.