He was busy in prison, but also unhappy and impatient. He was aware that the popularity of Napoleon Bonaparte was steadily increasing in France; the Emperor was the subject of heroic poems, books and plays. Huge crowds had gathered in Paris on 15 December 1840 when the remains of Napoleon Bonaparte were returned with great ceremony to Paris and handed over to Louis Napoleon's old enemy, King Louis-Philippe, while Louis Napoleon could only read about it in prison. On 25 May 1846, with the assistance of his doctor and other friends on the outside, he disguised himself as a laborer carrying lumber, and walked out of the prison. His enemies later derisively called him "Badinguet", the name of the laborer whose identity he had assumed. A carriage was waiting to take him to the coast and then by boat to England. A month after his escape, his father Louis died, making Louis Napoleon the clear heir to the Bonaparte dynasty.