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Regulating Throttle Cocks

1804

Trevithick's High Pressure Steam Engine and Boiler, c. 1806

1805-1806

Trevithick locomotive drawings and frames

circa 1804

[Mining cost books, also containing personal letters and accounts]

circa 1765-1816

Wrought Iron Boiler of Thrashing Engine

1812

[Letter] 1832 May 21 [to] Davies Gilbert, Westminster [forwarded to] Eastbourne / Richard Trevithick. [1p., holograph signed. Requests an appointment to meet Gilbert and Daniell at Gilbert's London house. Pencilled postscript concerns a ship's engine for a government ship at Chatham based on the principle "of condensing and returning the steam again"]

Letter 1832 May 21 [to] Davies Gilbert

1832

[Letter] 1813 Feb, Camborne [to] Robt. Fox Junr./Richard Trevithick. 2p. on 1 leaf. [Describes a trial of boring limestone, with detailed results; estimates likely output of "the engine at Hayle" when used for limestone cutting. In postscript: has sent to John Gould an estimate for an engine etc "for clearing mud from Falmouth Harbour".]

Letter 1813 Feb

1813

[Copy] Agreement between Richard Trevithick of Penzance in Cornwall, engineer ... and William Sims the younger of Gwennap in the same County, engineer. 1816 Oct 18. [2p. on 1 leaf. Trevithick sells to Sims a half share in the benefits from Devon and Cornwall of the patent dated 1815 Jun 6 [no.3922, improvements to steam engines etc.] Price £200 (plus £50 from future profits of Wheal Chance mine engine); arrangements for administration of the agreement while Trevithick is abroad]

Copy Agreement between Richard Trevithick of Penzance in Cornwall

1816

[Letter] 1828 Jan 24, Hayle [to] Richd. Edmonds, Penzance / Richard Trevithick. [2p. on 1 leaf, holograph signed. Asks Edmonds, his solicitor, to draw up an "indemnificiation" releasing John Williams from "all demands on Treshuly and Wheal Chance mines in future"; in return Williams will pay £150. Lengthy discussion of arrangements for transmitting the document to Williams]

Letter 1828 Jan 24

1828

[Letter] 1829 Feb 21, Hayle [to] Richd. Edmonds, Penzance / Richard Trevithick. [2p. on 1 leaf, holograph signed. Informs Edmonds, his solicitor, of agreement of all parties to "the rough draft of the agreement between my family and me", with the exception of certain provisions concerning Henry Harvey and Francis Trevithick (here set out in detail); requests Edmonds to make out the relevant deeds]

Letter 1829 Feb 21

1829

Mem[orandum] for Capt. Trevithick ab[out] Boilers, 1827 Dec. 4p. on 1 leaf. [Draft of a statement of the benefits to the nation resulting from Trevithick's inventions, including a quantitative estimate of the savings made by the introduction of high-pressure steam engines into Cornish mines (Poldice, Consolidated, Dolcoath).]

Memorandum for Capt. Trevithick ab[out] Boilers

1827

[Description and specification of] A Plan, Side and Cross Section for a Wrought Iron Ship/ Richard Trevithick [c. 1830] 2p. on 1 leaf. ["... a Wrought Iron ship scale one sixth of an Inch to the foot 70 feet Long and 35 feet Wide on the deck and 10 feet deep in the hold with three Iron Keels of 2ft wide with Iron ribs for strength[en]ing the hulls. The whole [rivetted] together the same as a steam engine boiler." Watermarked 1821. With ms. copy, in another hand, 31x19cm, watermarked 1821.]

Description and specification of A Plan, Side and Cross Section for a Wrought Iron Ship

circa 1830