Complex sentence: During this time, he suffered an accident in which his foot was burned and he was left alone at Poole's property underneath a lime tree while Lamb, the Wordsworths, and his wife went on a journey across the Quantocks.
Split into simpler sentences: During this time, he suffered an accident in which his foot was burned. As a result he was left alone at Poole's property underneath a lime tree, while Lamb, the Wordsworths and his wife went on a journey across the Quantocks.