- Richard Quiller Couch (1816-1863), naturalist (addnl): corresp with his father Jonathan Couch
- Thomas Furse, shipwright, Mevagissey: memoir 1767-1838
- Lady Ernestine Emma Horatia Edgcumbe of Mount Edgcumbe: journal 1864-71
- Richard Treffry, Methodist minister: journal 1802-9
- Sir William Lewis Salisbury Trelawny of Trelawne: accounts 1870-71
- Partis College, Bath: accounts 1844-1958 (Acc 423)
- P Fowler: Porth Godrevy, Gwithian archaeological site notes 1956-62
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Royal Institution of Cornwall