According to Vogt 1902 (see below), Carl de la Hitte from the museum in La Plata travelled to the upper Paraná in 1894 and, accompanied by Dr H. Ten Kate, in 1896/97, where they studied the "Guayakí". De la Hitte published the "Notes ethnographiques" in La Plata in 1897 (available at the IAI). Vogt interprets the animal skin headdress as a sign of the cacique (p. 36); the stone axe in the picture is made of diorite and a style of light wood. Caption in Ehrenreich 1898 (see below): "Fig. 3: Guayaki from Encarnacion 1894, after a photograph by La Hitte. Ibid. Plate I, 3."; Ehrenreich writes about the depicted Indian, who is only 1.52 metres tall and has been photographed in four different postures, that he is the "only adult [of the Guayaki] observed in detail to date". Literature: Vogt, P.F. 1902. Material on the ethnography and language of the Guayaki Indians. In: Zeitschrift für Ethnologie (Berlin) 34: 30-45 Ehrenreich, Paul. 1898. new information on the Guayaki (Stone Age people) in Paraguay. In: Globus 73: 73-78, Fig. 3. p. 74