[Castlebar]

Delaware is south of the Mason Dixon line.

[rockrr]

I had to look it up - The Mason Dixon line takes an abrupt right (southerly) turn that marks Delaware’s western border. Delaware is north and east of the Mason Dixon line.

[BroJoeK]

Castlebar: "Delaware is south of the Mason Dixon line."

This map shows the actual Mason-Dixon line:

This map shows an informal-understood extension to the Mississippi River:

Neither shows Delaware as "South".