Extended caption reads: "Bartola, that Chamorro woman who in 1885 supposedly tore down the German flag hoisted by [the German gunboat] Iltis, in protest against the German occupation of "'Spanish Territory'."
Source:
Haas, Salesius. 1912. Die Karolinen-Insel Yap. Ein Beitrag zur Kenntnis von Land und Leuten in unseren deutschen Südsee-Kolonien. Berlin: Wilhelm Süsserott, p. 15