Early 19th century milestone on the A52 at Swineshead, to the east of the junction with Fenhouses Drove. It is of painted ashlar limestone, and is square in plan with a pyramidal top. It is inscribed 'SLEAFORD 13 MILES' and 'BOSTON 5 MILES' in the respective side panels. For the full description and the legal address of this listed building please refer to the appropriate List of Buildings of Special Architectural or Historic Interest. {1}{2} The milepost was inspected as part of a condition survey of historic milestones in Boston Borough, conducted in early 2020. It was found to be in a relatively poor condition at that time, with lots of edge damage being noted. {3}