part I. The accident. 3:18 p.m., December 24, 1917 ; The whole city grieved ; Neighborhood indignation ; Family ties
part II. The back story. Building the Mount Washington Tunnel ; The St. Louis Car Co. Series 4200 car
part III. The aftermath. Accident investigation and coroner's inquest ; Criminal prosecution of motorman and dispatcher ; Civil claims arising from December 24, 1917 tunnel accident ; The Pittsburgh Railways Co. bankruptcy, 1918 ; Afterword ; Victims, rescuers and caregivers.