She inserted the slide carousel into the top of the projector. The two books, she had chosen to pass around were Marian Penner Bancroft's Two Places at Once with its unfolding pages of mountain ranges, lakes, and fields in which telephone wires were visible -- and Free Values, a miniature mail art-delivered object, in which a small accordion fold insert emerged from a matchbox. Sending these objects around the class, one in each direction, she turned on the projector, focused the first slide.

"Yuri can't see the slides from where he is sitting", one of her students pointed out. "We tried to talk him into sitting with us, but he says he needs to sit by the door."

"Nobody gets past Yuri," he said. "Unless", he added, "I can't see the slides, and I get bored and fall asleep."

She got up, moved the slide screen so that it was visible from where Yuri sat, moved the projector in line with the new position of the screen. Soon there was a quiet click click click, accompanied in the semi-darkness by her voice: "Accordion fold books. We begin in early China: the Tang dynasty in the Seventh Century..." In the background was the sound of faint whispers of students interpreting her words for Yuri, and the quiet opening and closing of Two Places at Once and Free Values. Caydance smiled and continued.