As a rule, logbooks or diaries are kept during excavations. They contain all observations and data, which were remarked, concluded, decided and so on during work. In this way, it is possible to read later why certain decisions were made. Important information may be written down about objects or layers that were not recorded by means of a drawing or photograph. In addition, the diary gives a good impression of the atmosphere during field work. All daily routines and activities are written down here. This diary describes the excavation campaigns of 1986 and 1987 in hall IV of Cave Corbeddu (Oliena, Sardinia). The most important mammal fossil bones of this hall belong to the pleistocene dhole-like Cynotherium sardous.