So it's the Great War and a number of recently deceased allied soldiers are living in the astral replica of a Franco-Flemish town that has been flattened by shelling. If they want furniture for their houses they go a curio shop where the stock is continually replenishing itself. "O look," says the shop keeper," There's a grandfather clock that wasn't there before." On Christmas Day they attend a service in Ypres cathedral.
Sometimes they'll catch a house reassembling itself. If the earthly counterpart is being slowly taken apart by shellfire the astral version will materialise in stages. First the roof and upper storeys appear- suspended in mid air- and then the lower portions attach themselves in chunks.