'Originally, this was a four-minute time-lapse film which was shot continuously over a twenty-four hour period. The camera was positioned on a busy pathway in Regent's Park, and recorded three frames a minute. The shutter was held open for the twenty-second duration between exposures, so that on projection, individual frames merge together making the pattered flows of human movement clearly perceptible. The time-lapse original was then expanded by various processes of refilming to reveal the frame-by-frame structure of the original.' - W.R.