[Letters (11)] 1807-1816 [to] Richard [and] Jane Trevithick/Henry Harvey. [/1: 1807 Sept 22, Hayle Foundry: concerns Trevithick's, and consequent, financial arrangements necessary to enable Harvey's sister Jane Trevithick to join Richard in London; /2: 1809 Mar 28, Hayle Foundry: Harvey has inspected "the Stone from St.Ives to Penzance and also in the neighbourhood of Penryn"; discusses possible arrangements and price for shipping "300 tons a fortnight" [for the Thames Driftway]; news of W[illiam] West and James Oats; /3-8: 1810 Jun 1-Aug 26, Hayle Foundry (and) Woolwich: four letters to Jane and two to Richard concerning Richard's recovery from critical illness; Richard's financial difficulties and measures to protect the family from his impending bankruptcy; inheritance of Trevithick property at Penpons [sic]. Constantly urges a return to Cornwall. (Some published in Life of Richard Trevithick/Francis Trevithick, 1872: /3 (complete) in v.1, pp. 340-1 and /8 (minor part) in v.2, p.154); /9-10: 1812 Nov 26 & 28, Holborn Hill, describes his attempts in London to secure for himself the receivership and management of [Hayle] Foundry against the nominees of Mr Blewett; reports conservation with Davies Gilbert re plans for Plymouth breakwater; describes his efforts to secure Trevithick's "certificate" (of discharge from bankruptcy?); /11: 1816 Apr 18, Hayle Foundry, concerns arrangements for trials of the Herland pole-engine (published in Life of Richard Trevithick/Francis Trevithick, 1872 v.2, p.101)]