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HER Number:	33247
Name:	BOSIGRAN - Undated stamping mill

Summary

The well preserved remains of a mid C19 water powered tin stamping mill.

Grid Reference:	SW 4300 3715
Parish:	Zennor, Penwith, Cornwall
Map:	Show location on Streetmap

Protected Status: None recorded

Other References/Statuses

Cornwall SURVEY NAME (temporary): NT 94497 CCRA 79-
National Mapping Programme (Morph No.): 290.12
Primary Record No. (1985-2009): 33247
SMR No. (OS Quarter-sheet and SMR No.): SW43NW 1

Monument Type(s):

STAMPING MILL (Unknown date)

Full description

Well preserved remains of a mid C19 water powered tin stamping mill. Built in 1861 to replace 33246 (to the south) (b3). By 1864 it had been expanded to include three water wheels (33247.1 - 33247.3) (b1), all recorded on the 1st Edition 1:2500 OS map 1876 OS map (b2). This map also records the disposition of the main tanks and round buddles on the two dressing floors (33247.4-5) as well as the leat (33247.6), calciner and stack (33247.7), and a reservoir (33247.8) serving the top dressing floor (b2). The site was planned at 1:200 by the National Trust in 1982 (h1, b4-6) and was visited in 1986 by Herring (h2, b7). The northern wheelpit (33247.3) clearly serves a second stamping mill (33247.9) to which the northern dressing floor (33247.5) belongs. A leat on a massive bastion (33247.1) brought water to the northern stamps wheelpit. Both stamping mills have spalling floors (33247.11 and 33247.12) for hand breaking the ore. The stamping mill was built on the site of Bosigran grist mill (30705) and served Carn Galver mine (33236). The complex of buildings, processing area, reservoir, leat, and stack are all visible on air photographs (p1) and was plotted for the NMP

--------------------------------
Site history:
1: 1982. THACKRAY, D / NT
2: 1986. HERRING, PC / CAU
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Cornwall Archaeological Unit, 1983, GRH 68/2/4/3, Bosigran - Porthmeor Lower Stamps, 1:200 (Cartographic materials). SCO24573.

Cornwall Archaeological Unit, 1983, GRH 68/2/4/4, Plan Of 'Porthmeor Lower Stamps' - Explanatory Overlay (Cartographic materials). SCO24575.

<1> Spargo, T, 1865, The Mines of Cornwall (Bibliographic reference). SCO4470.

NMR, 1979, SW4236/461 - 3 (Photographic Record). SCO16580.

<2> Ordnance Survey, 1880s, 1st Edition 1:2500 Map (Cartographic materials). SCO4048.

<3> Noall, C, 1982, St Ives Mining District, 107 (Bibliographic reference). SCO3994.

<4> Cornwall Archaeological Unit, Field Drawing (GRE), GRE 2128, 42, 43, 51, 75 (Cartographic materials). SCO5089.

<5> Cornwall Archaeological Unit, 198-, Drawing Archive, Hanging (GRH), GRH 241-4 (Cartographic materials). SCO5088.

<6> CAU, 1984, Field Survey Context Card, 79-118 (Bibliographic reference). SCO5175.

<7> Herring, PC, 1987, Bosigran, Zennor, 52, 141-148 & FIGS 35-39 (Bibliographic reference). SCO3569.

Sources / Further Reading

---	SCO24573 - Cartographic materials: Cornwall Archaeological Unit. 1983. GRH 68/2/4/3, Bosigran - Porthmeor Lower Stamps, 1:200.
---	SCO24575 - Cartographic materials: Cornwall Archaeological Unit. 1983. GRH 68/2/4/4, Plan Of 'Porthmeor Lower Stamps' - Explanatory Overlay.
[p1]	SCO16580 - Photographic Record: NMR. 1979. SW4236/461 - 3. ABP.
[1]	SCO4470 - Bibliographic reference: Spargo, T. 1865. The Mines of Cornwall.
[2]	SCO4048 - Cartographic materials: Ordnance Survey. 1880s. 1st Edition 1:2500 Map.
[3]	SCO3994 - Bibliographic reference: Noall, C. 1982. St Ives Mining District. 107.
[4]	SCO5089 - Cartographic materials: Cornwall Archaeological Unit. Field Drawing (GRE). GRE 2128, 42, 43, 51, 75.
[5]	SCO5088 - Cartographic materials: Cornwall Archaeological Unit. 198-. Drawing Archive, Hanging (GRH). GRH 241-4.
[6]	SCO5175 - Bibliographic reference: CAU. 1984. Field Survey Context Card. At CAU. 79-118.
[7]	SCO3569 - Bibliographic reference: Herring, PC. 1987. Bosigran, Zennor. Copy At CAU. 52, 141-148 & FIGS 35-39.

Associated Finds: none recorded

Associated Events

ECO4155 - Reconstruction and Stabilisation Work, Porthmeor Stamps (Ref: CGH/7317)

Related records

33247.07	Parent of: BOSIGRAN - Post Medieval calciner (Monument)
33247.06	Parent of: BOSIGRAN - Post Medieval leat (Monument)
33247.12	Parent of: BOSIGRAN - Post Medieval mine (Monument)
33247.10	Parent of: BOSIGRAN - Post Medieval platform (Monument)
33247.08	Parent of: BOSIGRAN - Post Medieval reservoir (Monument)
33247.04	Parent of: BOSIGRAN - Post Medieval tin mill (Monument)
33247.02	Parent of: BOSIGRAN - Post Medieval water wheel (Monument)
33247.01	Parent of: BOSIGRAN - Post Medieval water wheel, Post Medieval wheel pit (Monument)
33247.11	Parent of: BOSIGRAN - Undated mine (Monument)
33247.09	Parent of: BOSIGRAN - Undated stamping mill (Monument)
33247.05	Parent of: BOSIGRAN - Undated tin mill (Monument)
33247.03	Parent of: BOSIGRAN - Undated water wheel (Monument)

Associated Images

GRH 68/2/4/3-4 Combined — Annotated scale drawing (1:200) of Post Medieval stamping mills Porthmeor, Bosigran. Created in 1983 by the CCRA for the National Trust.
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