How does Castle Rackrent develop the theme of Unreliable Narration and Perspective?

Castle Rackrent by Maria Edgeworth develops Unreliable Narration and Perspective across the chapters the companion marks for this theme.

Thady Quirk, the loyal but naive narrator, presents events with a bias toward the Rackrent family, often missing or downplaying their flaws, while his son Jason's rise reveals a hidden agenda, creating ironic gaps between Thady's account and the reader's understanding.

Thady presents himself as 'honest' and loyal, but his narrative reveals biases, omissions, and a selective memory that shape the story of the Rackrents.