What are the motifs in The Flame Trees of Thika: Memories of an African Childhood by Elspeth Huxley?

Loyalty is a recurring idea seen mainly in Elspeth's family and most commonly in Tilly's loyalty to Robin. Tilly has had a difficult life as Robin's wife. The family was once wealthy enough that Elspeth had a nanny and Elspeth recounts the story of having overheard the nanny say that Robin "had a hole in his pocket." Tilly makes a reference to the jewels that she had once owned that had been sold after one of Robin's failed business ventures. For his part, Robin seems to be so incredibly trusting of others that he is likely to remain something less than a success, simply because he allows others to take advantage of him. As Robin continues to struggle with his plans and dreams, Tilly is left to work at his side and pick up the pieces when he is ready to move on to the next idea.