Dartmoor Explorations

A collection of walks, discoveries, insights and pictures of exploring Dartmoor National Park

Gratnar Tin Mill

Gratnar Tin Mill is located on private land on the right bank of a tributary of the River Bovey at SX720 836. It is named after a farm / dwelling known as Gratnar to the south east, on whose land it is located. Due to there being two mortarstones here it almost certainly was a stamping mill and is thought to have been in existence from before 1750. The author obtained access to the site through a walk organised by the Dartmoor Tinworking Research Group (DTRG) in February 2026.

The mill was discovered by Brian Le Messurier in 1983, being subsequently visited by Tom Greeves, who made a plan, which the author is grateful has been shared. The mill is heavily obliterated by a large tumble of boulders but despite this the walling and main outline can still be discerned. Other features at the mill include two door jambs and the remnants of a possible tail race. It has been recorded (Bodman) that the leat to the mill began near Barramoor Bridge but traces of it are vague and cannot be fully identified or ascertained.

Perhaps with a reference to the Tin Mill is a farmstead to the north called Millawns on OS maps. Interestingly the farmstead was known as ‘Mellons’ on the 19th century Tithe Map.

Bibliography

  1. J.E.B. Gover, A.Mawer, F.M. Stenton – (1932) – The Place-Names of Devon: Part Two, 471
  2. Dr. Tom Greeves – (1983) – Plan of Gratnar Mill (Greeves and Robinson) at 1:100 scale. Plan in Greeves’ collection
  3. M. Bodman – (2015) – Mills on the Teign. A gazetteer of water-powered sites on the Teign and Bovey and their tributaries, 100 
  4. Dr. Tom Greeves – (2026) – Pers. Conv.
  5. Stephen Holley (DTRG Chairman) – (2026) – Pers. Conv.
0. Map
This 19th century annotated map shows the location of Gratnar Tin Mill
0. Plan
The above sketch map is based on the hand drawn survey plan produced by Tom Greeves and Rosemary Robinson in April 1983.
1a. Mill
Gratnar Tin Mill when first viewed from the west just looks like a tumble of boulders cascading down a moderate slope. There is a samll enclosure attached to south-west side of mill
1b. Mill
Outline of the mill amongst the boulder tumble
2a. South West end of mill
Close up of the south west corner of the mill with walling clearly discernible amongst the boulder tumble
2b. South West end of mill
Another view of the south west corner of the mill looking along the length of the mill. The internal dimensions of the whole structure are 4.6m by 9.7m (Greeves)
2c. South West end of mill
The south west corner of the mill. It is possible the mill had two rooms
3a. Mortarstone nearest the mill
One of the two mortarstones – this one being next to the south west corner of the mill. It is located at SX72002 83609
3b. Mortarstone nearest the mill
Highlighted mortars ‘indents’ which are approx 20cm across
3c. Mortarstone
This is thought to be a triple mortarstone (Greeves)
4a. Door Jamb at mill
Door jamb ‘slot’ in the centre of the western wall. The slot is around 0.7m metres long and 10-12cm wide (Greeves)
4b. Door Jambs
Locations of the Door Jambs (with slots). The one nearest the camera wasn’t photographed
5. Inside the mill
Inside the mill
5a. North East end of mill
North east end of mill
5b. North East end of mill
Walling of north east end of mill discernible to the left in the photograph
5c. North East end of mill
Taken from the centre of the mill looking north east
6a. View from west
Location of the second mortarstone (not photographed)
6b. DTRG members
DTRG members at the mill in February 2026
7. Possible tailrace
Possible (shallow) tail race to the north of the mill heading towards the tributary of the Bovey
8. Leat
Possible traces of a leat (but maybe just a footpath) between the mill and Barramoor Bridge
9. Gratnar
Gratnar. Marked on OS maps as Gratnar Farm but is more to family home. Gratnar maybe mentioned as ‘Grenetorre’ in 1333 but it is unclear whether it refers to this location of another of similar name (Gratnor) near Hound Tor
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