29 - Lost Prince - Chapter 29 by Frances Hodgson Burnett

Lost Prince follows the gripping tale of Marco Loristan, a young boy whose life intertwines with his father, Stefan, a passionate Samavian patriot determined to dismantle the oppressive regime in their homeland. After arriving in London, Marco befriends a resilient street urchin known as The Rat, and together, they embark on a perilous journey across Europe. Entrusted by Stefan with a vital mission, the two boys must spread the secret phrase, The Lamp is lighted, igniting a revolutionary spirit that ultimately leads to the restoration of the rightful king. In a stunning climax, Marco discovers that his father is the descendant of Ivor Fedorovitch, the true heir to the throne of Samavia. (Summary from Wikipedia)