Watch on SFlix. Produced while the Black Audio Film Collective were undergraduates, Expeditions 1 – Signs of Empire is the first of a two-part 35mm slide-tape text entitled Expeditions; part two is entitled Images of Nationality. The work toured England from November 1984 to March 1985, using a Kodak dissolve unit to sequence images into narrative. The soundtrack to Signs of Empire, which consisted of tape loops of musique concrete and political speeches, was amplified to create a powerful environment of dread.