Autograph letter signed.

4to. 1 p. Beautiful and content-rich letter to an unnamed philosopher and theologian who was working on a not further specified theological book. Mamiani apologizes for a delayed response due to an ailment of his eyes and congratulates the recipient on his choice of topic, lauding his erudition extensively: "In voi ho sempre ammirato una perfetta armonia dell'ingegno e dell'animo ne conosco scrittore che ponga negli studi quella intenzione pura del bene e quella religione del vero che si scorge ad ogni pagina de' vostri libri. Io mi rallegro pertanto con voi e con la, filosofia sulla scelta che fatta avete del tema della nuova opera vostra. Voi la compirete del sicuro con gran coscienza e recher gran lume ad ogni ragion di persone." - Originally attached was a brief outline "of the main strands of religious thought as it is cultivated today in Italy by its few philosophers" and a small publication by Mamiani, "which has some relation to the subject and which has produced a lively impression in Rome itself" (transl.). - As a leading participant in the unrest in Bologna following the election of Pope Gregory XVI in 1831, Mamiani went to exile in Paris until 1848, when the revolutionaries forced Pope Pius IX to allow the Count to return to Rome and become Minister of the Interior in the newly formed government. In the wake of the proclamation of the short-lived Roman Republic in 1849, Mamiani went to Genova, where he committed himself to the project of Italian unification. In 1860, he became minister of education of the Kingdom of Sardinia under Cavour. For the newly established Kingdom of Italy, Mamiani took on diplomatic duties, first in Greece from 1863 and then in Switzerland from 1865 until his retirement in 1867.