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Summary

A redan of triangular plan, consisting of a platform with stone faces angled SSW and west, projects from the mid-C18 curtain wall.

Protected Status

• Scheduled Monument 15434: POST-MEDIEVAL BREASTWORK, CURTAIN WALL AND ASSOCIATED DEFENSIVE STRUCTURES ON THE PERIPHERY OF THE GARRISON, ST MARY'S
• Listed Building (I) 62521: OUTER WALLS AND GATEWAY

Other References/Statuses

• National Monuments Record: SV 81 SE 506
• National Record of the Historic Environment to Historic Environment Records data transfer
• National Record of the Historic Environment: 1445642
• NBR Index Number: 111235
• OS No. (OS Quarter-sheet and OS No.): SV81SE 506
• Primary Record No. (1985-2009): 7906.24
• SMR No. (OS Quarter-sheet and SMR No.): SV81SE 31

Monument Type(s):

• BASTION OUTWORK (18th Century - 1701 AD to 1800 AD)

Full description

A redan of triangular plan, consisting of a platform with stone faces angled SSW and west, projects from the mid-C18 curtain wall (7906.18) at this location. The site is a Listed Building, Grade I and is Scheduled (h1). A small quarry immediately east was presumably the stone source (7095.18). This section of the Garrison walls does not appear on the 1741 map (b1). Plans of 1742 and 1746 indicate proposed redans differing from those built along the SW coatline (b2, b3). The redan as built is shown on Tovey's 1870 map as 'salient angle' (b4). On a visit in 1990, an incised 'X' resembling a mason's mark was noted inside the SSW wall near its end (h2, b8). The site is 'Redan B' on the 1991 survey (h4). The monument is included in the Schedule.

Described in 1995 (9): The redan walls are generally 1.7m thick, 1.3m high on the inner face and 2.75m high on the steeply battered outer face. The ashlar blocks are a fairly regular 0.2m - 0.3m high. The walls are pierced drainage slots. The fabric of the redan differs from that of the adjoining curtain wall indicating that it was built at a different time. The wall capping changes too. Beyond the broad track at the rear of the triangular interior is a rock cut quarry which provided the dimension stone and the ashlar for the wall face. This quarry also effectively extends the redans levelled surface by a further 7m.

Described in 2005 (10): There are two embrasures plus a third at the apex of the redan - all of which face out to sea so that none enfilade the adjacent walls.

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Site history:
1: 1978. NJA/OS
2: 1990. PARKES, C/CAU
3: 1990. JOHNSON, N/CAU
4: 1991. UNKNOWN/EH
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National Monument Record, The Garrison Survey, St. Mary's, Isle of Scilly (Survey). SCO29940.

<1> UNKNOWN, 1741, A PLAN OF HUGH GARRISON IN ST MARY'S ISLAND AT SCILLY (Unedited Source). SCO5540.

<2> UNKNOWN, 1742, A PLAN OF HUGH FORT ALIAS THE STAR CASTLE (Unedited Source). SCO5544.

<3> UNKNOWN, 1746, A PLAN OF THE HUGH FORT (Unedited Source). SCO5552.

<4> Tovey, A, 1750, A Plan of the Peninsula and Fortifications on St Mary's (Bibliographic reference). SCO4950.

<5> Birch, JF, 1974, Plan of the Garrison on the Island of Saint Mary, Scilly (Bibliographic reference). SCO2851.

<6> Ordnance Survey, 1880s, 1st Edition 1:2500 Map (Cartographic materials). SCO4048.

<7> Ordnance Survey, 1900s, 2nd Edition 1:2500 Map (Cartographic materials). SCO4050.

<9> Field Investigator's Comments, MPPA/Hooley, D. 1995. (Survey). SCO29739.

<10> Field Investigator's Comments, EH/Fletcher, M. 2005. (Survey). SCO29739.

Sources / Further Reading

Associated Finds: none recorded

Associated Events

• ECO3128 - Garrison Walls, Isles of Scilly, conservation plan
• ECO6309 - The Garrison, St. Mary's: Survey

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