Post-Medieval ditches and Undated Features from the Perse School, Cambridge

Between the 9th and 11th of May 2016 an archaeological evaluation was undertaken by Oxford Archaeology East in advance of the construction of a new artificial grass all-weather pitch at the Perse Upper School, Cambridge (TL 4618 5580). This evaluation took the form of six 30m trenches covering 5% of the development area.
The trenches were excavated to a chalky marl natural and revealed limited archaeological remains alongside periglacial features. Archaeologically, a series of undated, though potentially prehistoric or Roman ditches were uncovered on the same north-east to south-west and north-west to south-east alignment as those of the coaxial field system identified in the Addenbrooke's area to the south and Clay Farm to the south-west.
Two post-medieval ditches were also identified forming part of a boundary and drainage system within the area. The boundary ran perpendicular to a boundary identified in 2008, on a north to south alignment, with the drainage ditch running east-north-east to west-south-west and parallel to ditches identified in the 2008 and 2012 evaluations to the south-east.
An isolated and undated posthole was also identified, as well as a series of pits of uncertain date.