Such are the prominent features of this vast Basin or Table-land, in the interior of our continent, but as it is now separated by legislation from its former territorial adjunct, we shall pass at once to the consideration of the present boundary of California. This, according to the XIIth article of the State Constitution, sanctioned by the act of Congress, commences at the point of intersection of the 42nd degree of north latitude with the 120th degree of longitude west from Greenwich, and runs south, on the line of the 120th degree of longitude until it intersects the 39th degree of north latitude; thence a straight line pursues a south-easterly direction to the River Colorado, at a point where it intersects the 35th degree of north latitude; thence, the boundary runs down the middle of the channel of that river, to the boundary line between the United States and Mexico, as established by the Treaty of Guadalupe Hidalgo; thence, west and along said boundary line to the Pacific Ocean and extending therein