Letters and handwritten copies of letters previously stored in envelope labelled 'Seddon letters'. Copies consist of:
- John Seddon to James Nicholson 1752-1768, 24 letters.
- Peter Seddon to James Nicholson, 31st August, 1759, 1 letter.
- Mrs. John Seddon (Mary) to Matthew Nicholson, 3rd December, 1758, 1 letter (with Matthew Nicholson's menu of dinner at Warrington).