The British would cede all lands east of the Mississippi River and North to Canada to the United States except for Florida, which would be given back to Spain.
It was not constitutional
The excerpt reflects the viewpoint of Federalists.
The above appreciations can be found in Alexander Hamilton text "The utility of the union as a safeguard against domestic faction and insurrection." In it, the idea of the Confederate Republic defined by Hamilton as an <em>assemblage of societies</em> is characterized. It defines the extension up to which democracy should operate.
Thus, the ideas in the excerpt are also, some of the ones that constitute what Hamilton referred to as the <em>science of politics and representation</em>, which contained elements that categorized an innovative government as the US is.