Complex sentence: The Duke later recounted a story, suspected to have come directly from Victoria: according to him, when Victoria was young she had caught Conroy and the Duchess engaged in what were diplomatically called'familiarities'.
Split into simpler sentences: The Duke later recounted a story, suspected to have come directly from Victoria. According to him, when Victoria was young she had caught Conroy and the Duchess engaged in what were diplomatically called'familiarities'.