Complex sentence: Major Alexander Henderson, the Laird of Westerton, drew up plans of how he wanted the village to be laid out in 1850, envisaging spacious streets with pleasure grounds in the woods.
Split into simpler sentences: Major Alexander Henderson, the Laird of Westerton, drew up plans of how he wanted the village to be laid out in 1850. The plan envisaged spacious streets with pleasure grounds in the woods.