Will loves his clinkers! These are chunks of coal that were not completely burned in the firebox of the old boiler. They must have been tossed out into the parking lot ages ago, now Will finds them and saves them. It reminds us of what an ashy, sooty mess it was with all the coal being burned downtown, and how it was a real problem disposing of all of the ash from the countless fireplaces and boilers. Our ancestors would be tickled to death to see what we save!