Complex sentence: Shogun Tokugawa Yoshinobu was pressured by Sir Harry Parkes, head of the British Legation in Edo to find the culprit, and the shogunate was not disposed to dispute the evidence, since ocnveniently weakened a feudal domain whose loyalty was increasing uncertain.
Split into simpler sentences: Shogun Tokugawa Yoshinobu was pressured by Sir Harry Parkes, head of the British Legation in Edo to find the culprit. The shogunate was not disposed to dispute the evidence, since it conveniently weakened a feudal domain whose loyalty was increasing uncertain.