- 1A statement of the premiums owned on Trevithick's patent for high pressure steam engines (MS/1944/01)
1804, item - 2Statement of accounts between Messrs Trevithick and Co and Samuel Homfray (MS/1944/04)
December 1803-July 1807, item - 3Letter from Samuel Homfray to Messrs Haynes and Douglas (MS/1944/08)
23rd April 1808, item - 4Letter from Samuel Homfray to Messrs Haynes and Douglas (MS/1944/13)
24th September 1808, item
