The Correspondence between Manning and Tuthill mainly dates from the time when they were both resident in Europe (1798-1806). There is also one earlier letter and a letter from Manning whilst he was in Bengal 1811.

There is further correspondence regarding Manning being executor of Tuthill's will which includes letters between Manning and Tuthill's daughter, Laura (1835-1836)

Letter from Thomas Manning to George Tuthill from (Runjpore), Bengal. Manning has his passport from the Rajah of Bootan (Bhutan) to travel through his country to Lhasa to see the Grand Lama. He will set off the following day. He sends his love to Tuthill' s wife, Maria, and daughter and wishes he was with his friends in England. He likes Tuthill' s plans about Medicine and about publishing a Greek Dictionary about which Manning writes that he knows a great deal about particles and prepositions, compounds and tenses which has never been published. Manning writes though he knows much, he is not keen on Fame. He asks Tuthill for news on Bonaparte's campaign. He adds a postscript about a paper he should have sent to Charles Lamb and in some boxes makes notes about Wordsworth, Coleridge and Lamb. Handwritten, 1 piece, 3 sides. Dated (in letter) 27 August 1811