Janet Leigh sang "I'm Not Sorry."
The Old Dock , originally known as Thomas Steers ' dock , was the world 's first commercial wet dock .. wet dock. floating dock ( impounded ). Thomas Steers. Thomas Steers. The 3 +1  /  2 acre dock was built on the River Mersey in Liverpool , England , starting in 1710 and completed in 1716 .. Liverpool. Liverpool. River Mersey. River Mersey. England. England. A natural tidal pool off the river Mersey was partially filled and locked in from the river with quay walls erected .. The `` Pool '' gives its name to Liverpool .. Liverpool. Liverpool. Thomas Steers was the engineer responsible ; additional advice was obtained from George Sorocold .. Thomas Steers. Thomas Steers. George Sorocold. George Sorocold