Complex sentence: He was shipped home to England but found that due to the nature of his injuries he was unable to return to his music hall career and tried a brief period as a comic, travelling the American circuit in New Orleans.
Split into simpler sentences: He was shipped home to England but found that, due to the nature of his injuries, he was unable to return to his music hall career. Initially he tried a brief period as a comic, travelling the American circuit in New Orleans.