Orsini was arrested in 1844 along with his father, implicated in revolutionary plots and condemned to imprisonment for life. The new pope,
Pius IX set him free, and he led a company of young
Romagnols in the
First War of Italian Independence in 1848, distinguishing himself in the engagements at
Treviso and
Vicenza. Orsini was elected member of the Roman Constituent Assembly in 1849, and after the fall of the
revolutionary republic in Rome, he conspired against the papal autocracy in the interest of the Mazzinian party. Mazzini sent him on a secret mission to
Hungary, but he was arrested in 1854 and imprisoned at
Mantua. He escaped a few months later using a tiny saw to cut through two grids of bars, climbed out of the window 100 feet above ground and slid down using a rope he had made of bedsheets. Passing as a sympathetic peasant, he managed to get past the Austrian guards. In 1856, he briefly visited
Great Britain and received a favourable welcome. The daily news had published the first English translation of his tale of escape. He published
The Memoirs and Adventures of Felice Orsini in 1856. In 1857, he also published an account of his prison experiences in English under the title of
The Austrian Dungeons in Italy, which led to a rupture between him and Mazzini. Then he began to negotiate with
Ausonio Franchi, editor of the
Ragione of
Turin, which he proposed to make the organ of pure republicans. Orsini became convinced that
Napoleon III was the chief obstacle to Italian independence and the principal cause of the anti-liberal reaction throughout
Europe. He plotted his assassination with the logic that after the emperor's death, France would rise in revolt and the Italians could exploit the situation to revolt themselves. He went to
Paris in 1857 to conspire against the emperor. At the end of 1857, Orsini briefly visited England, where he contacted gunsmith Joseph Taylor and asked him to make six copies of a
bomb of Orsini's own design; it would explode on impact and used
fulminate of mercury as an explosive. The bomb was tested in Sheffield and Devon with the aid of French radical
Simon Bernard. Satisfied, Orsini returned to Paris with the bombs and contacted other conspirators,
Giovanni Andrea Pieri,
Antonio Gomez and Carlo di Rudio (later changed to
Charles DeRudio). ==Assassination attempt on Louis Napoleon==