I Swear I Saw This records visionary anthropologist Michael Taussig's reflections on the fieldwork notebooks he kept through forty years of travels in Colombia. Taking as a starting point a drawing he made in Medellin in 2006--as well as its caption, "I swear I saw this"--Taussig considers the fieldwork notebook as a type of modernist literature and the place where writers and other creators first work out the imaginative logic of discovery...