On the edge of Alnwick, in Northumberland, stood Swansfield House, an elegant villa that in the late 18th century was home to Henry Collingwood Selby (1748-1839), agent to the 1st Duke and Duchess of Northumberland of Alnwick Castle. Following the lead of his monument-building patrons, he embellished his small estate with a tower, a column, and a curious gothic structure.