Each state of the United States selects two senators to represent their states in the United States Senate. In 1913, the 17th Amendment[?] to the United States Constitution provided for the direct popular election of senators; prior to this, senators were selected by state legislatures.
... Line, District Line or Northern City Line (Great Northern & City Railway) remain open as mainline stations:
Great Missenden tube station[?]
Wendover tube ...