The St. Louis directory and register :
Section IV.

1. The times, places, and manner of holding elections for sena-
tors and representatives, shall be prescribed in each state by the le-
gislature thereof: but the Congress may, at any time, by law, make
or alter such regulations, except as to the places of choosing se-
nators.

2. The Congress shall assemble at least once in every year; and
such meeting shall be on the first Monday in December, unless they
shall by law appoint a different day.