1 sheet Copy Letter from Thomas R. Edmonds to Francis Trevithick Regarding Papers Relating to Richard Trevithick
1 sheet Copy Letter from Edward Watkins to Thomas R. Edmonds Relating to Papers of Richard Trevithick
1 sheet Copy Letter from Francis Trevithick to Edward Watkins Regarding Richard Trevithick’s Time in South America
1 sheet Letter from Henry Hyde Clarke to Francis Trevithick Regarding a Claim Against the Peruvian Congress
2 sheets Letter from John Hughes to Francis Trevithick Regarding Trevithick’s First Locomotive at Penydarren
1 sheet Letter from the Secretary of the Society of Arts to Francis Trevithick Regarding a Bust of Richard Trevithick
1 sheet Letter from Michael Williams to Edward Watkins Regarding Richard Trevithick’s Work on Steam Engines
1 sheet Letter from Henry Hyde Clarke to Francis Trevithick Regarding Francis’ Memoir and Claim Against the Peruvian Congress
1 sheet Letter from Henry Hyde Clarke to Francis Trevithick Advising on His Claims Against the Peruvian Congress
1 sheet Letter from Frederick Trevithick to Francis Trevithick Regarding Recollections of Richard Trevithick's Steam Engine
1 item Letter from William Hammond Ambler [husband of Ann Ambler (nee Hackworth)], Huddersfield to Thomas Greener [?]