The scheme in question was the grand proposal for a South Central Pacific and Mexican railway, which was to run from the Salt Lake City, thus branching off from the San Francisco and Chicago line,--and pass down through the fertile lands of New Mexico and Arizona, into the territory of the Mexican Republic, run by the city of Mexico, and come out on the gulf at the port of Vera Cruz. 
The scheme in question was the grand proposal for a South Central Pacific and Mexican railway, which was to run from Salt Lake City, branching off from the San Francisco and Chicago line, and pass down through New Mexico and Arizona, into the Mexican Republic, coming out on the gulf at the port of Vera Cruz. 