These are a mixture of personal and official letters from Manning's return to England in 1817 until his death. Highlights include correspondence with the East India Company concerning possible employment of the Chinese men that Manning had brought back with him, letters regarding spying in the Napoleonic Wars and letters of introduction for Manning's time in Italy

These are letters of introduction for Thomas Manning from Du Tressne in Florence. They suggest that Manning was intending travelling whilst based in Italy. They are:

• Letter of introduction for Thomas Manning to Monsieur Courlet at Vevey from [ Du Tressne] in Florence. Dated 20 April 1829. Handwritten in French. I piece, 1 side.
• Letter of introduction for Thomas Manning to Messieurs Henri Hentsch at Geneva from [ Du Tressne] in Florence. Dated 20 April 1829. Handwritten in French. I piece, 1 side.
• Letter of introduction for Thomas Manning to Messieurs de Molin at Lausanne from [ Du Tressne] in Florence. Dated 20 April 1829. Handwritten in French. I piece, 1 side.
• Letter of introduction for Thomas Manning to Messieurs Mirabaud at Milan from [ Du Tressne] in Florence. Dated 20 April 1829. Handwritten in French. I piece, 1 side.
• Covering wrappers for Letters of introduction addressed to Thomas Manning at Florence.