This article presents six original letters from V. Gordon Childe and the draft replies by the archaeologist Ferenc László, written between 1923 and 1925. László worked at the Szekler (Székely) National Museum of Sf. Gheorghe and was known for his methodical excavations of the late Neolithic (Chalcolithic) painted pottery settlement of Ariuşd (Erősd). The correspondence provides new data on Childe's interest in the archaeology of Transylvania, especially as regards the existence in the area of prehistoric cultures with painted pottery, on which limited published information was available to him. In this article it will be shown that correspondence was one of the main methods Childe used to gather documentation for his book The Dawn of European Civilization.