According to Vogt 1902 (*), Carl de la Hitte travelled from the museum in La Plata in 1894 and, accompanied by Dr. H. Ten Kate, in 1896/97, to the upper Paraná, 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, Paul. 1898. new information about the Guayaki (Stone Age people) in Paraguay. In: Globus 73: 73-78, Fig. 2. p. 75: "Fig. 3. Guayaki from Encarnacion 1894, after photograph by La Hitte. Op. cit. 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] that has been closely observed to date. *Vogt, P.F. 1902. Material on the ethnography and language of the Guayaki Indians. In: Journal of Ethnology (Berlin) 34: 30-45, p. 32