Pier 13, Saturday, October 18th, 2014. 10:00 am GM A lonely construction trailer sat in the middle of a small sea of concrete at the base of the pier; beyond it stood the long enclosed shed which thrust some eight hundred feet out into the river. The shed was three stories tall and stoutly built, with a dark metal roof, and a concrete walkway some thirty feet wide went all the way around it. In front of the trailer stood Grimalkin, looking somewhat out of place in her domino mask and black-