Details

This monument includes a pillow mound situated amongst earlier tin
streamworking earthworks within the valley of the Blacka Brook. This mound
forms part of Trowlesworthy Warren, which includes around 64 pillow mounds and
40 vermin traps scattered along the slopes of Little and Great Trowlesworthy
Tors. The boundaries of the warren are denoted by the River Plym, Spanish
Lake and Blacka Brook. Trowlesworthy Warren is generally accepted as the
oldest surviving warren on the Moor. Sometime before 1292 Samson de
Traylesworthie was granted land for rabbit farming by Baldwin de Redvers, Earl
of Devon. Many years later in 1551, the warren was leased to William
Woollcombe. The warren appears to have remained in constant use until the
first half of the 20th century.
This pillow mound survives as a 28m long, 6.5m wide and 1m high, flat-topped,
rectangular shaped mound of soil and stone surrounded by the 1.3m wide and
0.3m deep ditch from which material was quarried during its construction.
This pillow mound lies on top of earlier tin streamworking spoil dumps and
therefore is clearly more recent than the last phase of tin exploitation in
this part of the Blacka Brook.
The streamwork earthworks adjacent to the monument are not included in the
scheduling because they are not currently considered to be of national
importance, but those below the mound and ditch are included.

MAP EXTRACT
The site of the monument is shown on the attached map extract.
It includes a 2 metre boundary around the archaeological features,
considered to be essential for the monument's support and preservation.

Source: Historic England

Reasons for Scheduling

Dartmoor is the largest expanse of open moorland in southern Britain and,
because of exceptional conditions of preservation, it is also one of the most
complete examples of upland relict landscape in the whole country. The great
wealth and diversity of archaeological remains provide direct evidence for
human exploitation of the Moor from the early prehistoric period onwards. The
well-preserved and often visible relationship between settlement sites, major
land boundaries, trackways, ceremonial and funerary monuments as well as later
industrial remains, gives significant insights into successive changes in the
pattern of land-use through time.
Warrens are areas of land set aside for the breeding and management of rabbits
or hares. They usually include a series of purpose-built breeding places,
known as pillow mounds and buries, vermin traps and enclosures designed to
contain and protect the animals, and living quarters for the warrener who kept
charge of the warren.
Pillow mounds are low oblong-shaped mounds of soil and/or stones in which the
animals lived. They are usually between 15m and 40m long and between 5m and
10m wide. Most have a ditch around at least three sides to facilitate
drainage. Inside are a series of narrow interconnecting trenches. These were
excavated and covered with stone or turf before the mound was constructed.
Vermin traps of various kinds are found within most warrens. These include a
small stone-lined passage into which the predator was funnelled by a series of
ditches or walls. Over 100 vermin traps have been recorded on the Moor, with
the majority lying in the Plym Valley.
Warren boundaries were often defined by a combination of natural features such
as rivers. Within the warrens themselves smaller enclosed areas defined by a
ditch and bank are sometimes found, and some of these may have been
specialised breeding areas. Many of the warrens on the Moor contain a house in
which the warrener lived.
Most of the surviving warren earthworks probably date to between the 17th
century and the later 19th century, with some continuing in use into the early
20th century. At least 22 warrens are known to exist on the Moor and together
they contribute to our understanding of the medieval and post-medieval
exploitation of the area. All well-preserved warrens are considered worthy of
protection.

The pillow mound 490m south of Trowlesworthy Warren House survives well, and
forms part of the nationally important Trowlesworthy Warren and contains
information relating to the exploitation of rabbits in the Upper Plym valley.
The superimposition of this mound onto a series of earlier spoil dumps from a
tin streamwork provides stratigraphical information relating to these two
industrial activities. This valley contains the densest concentration of
pillow mounds and other structures associated with rabbit farming on the Moor.

Source: Historic England

Sources

Books and journals
Crossing, W, Crossing's Guide To Dartmoor, (1990), 431
Other
Devon County Sites and Monuments Register, SX56SE351, (1987)
MPP fieldwork by S. Gerrard, (1995)
National Archaeological Record, SX56SE66,
Thackray, C., The Upper Plym Valley: The management of an historic landscape, 1994, Archaeological Site Inventory

Source: Historic England