Where have we been wandering about?  was a textile factory which had been closed for more than ten years.  All of the machines were carried out...only dust lay on the floor.  I thought that the layers of dust expressed time.  As observers walked the site, it was as if they were walking over time. 

I installed microphones under the floor then made projected their footsteps with a time delay by one step, repeating the past in the present.