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 George Tuthill to Thomas Manning from "Freiberg in Upper Saxony". He writes that he is sorry not to have seen Manning before he left England nor written since and inquires about Manning's mathematical discoveries. After 2 months in Dresden he is in Freiberg studying mineralogy alongside Chemistry. There is a mining academy there which serves the surrounding silver mines. He has met Werner (Abraham Gottlob Werner 1749 – 1817, a German geologist). Tuthill is learning Chemistry with Lampadius (Wilhelm August Lampadius, 1772-1842, Professor of Chemistry and Mineralogy) . Tuthill' s wife Maria is busy learning the language. Tuthill is also reading the literature of Wiland, Goethe and Herder. Tuthill has visited Bohemia and wished Manning had shared the wildness with him. He hopes to be in a situation to see lots of Manning when he returns. Handwritten, 1 piece, 3 sides. dated 6 October 1798