- 1Collection of letters from Andrew Vivian to Richard Trevithick (MS/1156/6)
1828-01-10, file - 2Letter from Andrew Vivian to Richard Trevithick concerning patent and business controversies (MS/1156/4)
1805-07-01, file - 3Letter describing the death of Vivian's son, Andrew and his own attempts to sell his share in the joint patent of 1802 (MS/1156/3)
1805-05-22, file - 4The letter describes Vivian's attempts to secure a joint patent for the high pressure steam engine of 1802 (MS/1156/2)
1802-03-23, file - 5The letter concerns news of Trevithick's family, local gossip and business affairs (MS/1156/1)
1802-02-23, file - 6Letter concerning the performance of Cornish mine engines (MS/1156/5)
1806-05-30, file - 7Letter from Andrew Vivian to his brother Captain Johnson Vivian (MS/1479)
1803-06-29, fonds - 8Collection of letters from Andrew Vivian to Richard Trevithick (MS/1156)
1802 -1828, fonds
