The plague doctors’ masks on the frontispiece of the “Leviathan”, John Locke’s empty land, the photographs by Carleton Watkins, a military policeman’s protective mask, the colonial history of the deportation camps, the plague policies and the Sans-Papiers – these are the seemingly disparate pieces that Francesca Falk assembles into a mosaic to create a gestural history of the border. The mosaic lets territorial borders emerge from programmes of visualization and transparency, reveals their historicity and shows them as fault-lines of our society that produce violence.