This publication is edited by John Herschend and Will Rogan. The glasses case is incised, "Chaldron Optica System." The side arms of the glasses are incribed as follows: "Will you know a chaldron when you see one?" and "With these glasses you will know a true one." A chaldron is described by Lethem in the looses sheet by 12 statements, a few of which are "A chaldron is an impossible object," A chaldron speaks of the possibility of another world," "A chaldron is like an opers pouring from a flea's mouth" and "It is better to have seen and lost a chaldron than never to have seen a chaldron at all." -- Source of annotation: Marvin or Ruth Sackner.