Complex sentence: The following year Elizabeth paid a sudden visit to the Priory, when returning to Warwick from Kenilworth, on Saturday night, 17 Aug., having dined with Fisher's son, Edward, at his house at Itchington on the Monday previously.
Split into simpler sentences: The following year Elizabeth I paid a sudden visit to the Priory, when returning to Warwick from Kenilworth, on Saturday night, 17 August. She had dined with Fisher's son, Edward, at his house at Itchington on the Monday previously.