Keith Laumer, The Star-Sent Knaves
“ Eight hours, three sandwiches and six beers later, Dan roused suddenly from a light doze and sat up on the cot. Between him and the crowded shelving, a palely luminous framework was materializing in mid-air.The apparition was an open-work cage—about the size and shape of an out-house minus the sheathing, Dan estimated breathlessly. Two figures were visible within the structure, sitting stiffly in contoured chairs. They glowed, if anything, more brightly than the framework.A faint sound cut into the stillness—a descending whine. The cage moved jerkily, settling toward the floor. ”
