RESUMEN Este trabajo tiene como objetivo presentar y analizar la defensa que hizo el Pbro. Domingo Milanesio (misionero salesiano en la Patagonia entre 1880 y 1912) de una racional distribución de la tierra fiscal en Nor-Patagonia en favor de los pueblos originarios, los colonos chilenos, y los inmigrantes italianos. La defensa del minifundio como medio eficaz de desarrollo y poblamiento lo encara en una serie de cartas que intercambió con funcionarios nacionales, provinciales y locales y en escritos ad casum hallados en su archivo. La crítica al criterio de venta de tierras fiscales llevada adelante por el Estado Argentino, no es ideológica ni política, sino que se apoya en su vasta experiencia de misionero itinerante durante 30 años en las tierras en cuestión.PALABRAS CLAVE: Expropiación – Tierras fiscales – Derechos de los pueblos originarios – Conocimiento exhaustivo de Milanesio – Gestiones.FATHER MILANESIO’S NEGOTIATIONS FOR THE RIGHT OF OWNERSHIP OF THE LANDS OF THE ORIGINAL PEOPLES, CHILEAN SETTLERS AND ITALIAN INMIGRANTS EXPRESSED IN HIS LETTERS OF 1911 TO 1919.ABSTRACT The task of this work is to present and analyse the defence hold by the presbyter Domingo Milanesio (Salesian missionary in the Patagonia between 1880 and 1912) concerning to a rational distribution of fiscal land in North Patagonia in favour of the original peoples, the Chilean settlers and the Italian immigrants. The defence of smallholdings as an efficient means of development and settlement is approached in a series of letters that he exchanged with national, provincial and local civil functionaries and in ad casum writings found in his archives. His criticism of the criteria concerning the sale of fiscal lands carried out by the Argentine State is neither ideological or political, but based on his vast experience as an itinerant missionary during 30 years in the lands in question.KEY WORDS: Expropriation – Fiscal lands – Rights of the original peoples – Exhaustive knowledge of Milanesio - Negotiations.