Images reveal something and show themselves, and therein lies their power. Gabríela Fridriksdóttir’s extraordinary iconographies, developed in drawings, paintings, sculptures, and, most succinctly, in technically impeccable films, draw upon a complex network of sign systems found in various cultures’ myths and sagas. But the Icelandic artist narrates her films, in which no words are spoken, through the immensely beguiling power of images alone. The fifteen-minute video Ouroboros, 2007, was the heart of her recent exhibition, shown inside a large wooden cube erected in the middle of the gallery