Complex sentence: The conspirators proclaimed their loyalty to the Emperor, and petitions, 350,00 signatures, and some 110,000 letters written in blood, pleaded for leniency on the conspirators.
Split into simpler sentences: The conspirators proclaimed their loyalty to the Emperor. Petitions with some 350,00 signatures, and some 110,000 letters written in blood, pleaded for leniency on the conspirators.