Iliyana Nedkova, the curator of the exhibition, invited me to respond to Millar's film here because she felt it poses similar questions, about loss, identity and screendance, to my recent body of work, Acts of Holding. Millar and I are both mature female artists thinking about mortality (I was told once by a curator that he was so tired of women making work about things like death and motherhood – right before I showed him my portfolio….). Witness is part of a longer documentary and so the version I have seen acts both as a trailer for this longer film, and a screendance in its own right. Watching something that you know is an edited version of something longer sets up an interesting tension, particularly, perhaps, when it concerns a state ...