Full titles read: "Lord Derby - makes rare public appearance to inaugurate "go ahead" Liverpool's new £1,000,000 Dock."
M/S of a group of dignitaries including Lord Derby and the Lady Mayoress of Liverpool, Margaret Bevan, walking about the docks. M/S of a huge liner breaking through a ribbon stretched across part of the docks as it moves out onto the River Mersey. L/S of the liner heading off down the river, towards the Liver Building.
Note: alternative spelling - Margaret Beavan; Margaret Beaven.