Arthur J. Burks, The vanishers (1950)
“ Ten sets of footprints led in a wavering line back to the invisible dome which hemmed us in. Hoose and I hung back to let Matzuku go on ahead of us. He came to the invisible wall and halted, looking foolish as a fore-thrust foot slid down what appeared to be nothingness.The footprints all ended against the invisible wall. Moonlight shed its brilliance over everything, and we could see far out beyond the invisible wall, into the eerie area of sand dunes, stunted brush, to a horizon which offered no hope whatever. ”
