The constitutional power of the Federal Government to construct or promote works of internal improvement presents itself in two points of view--the first as bearing upon the sovereignty of the States within whose limits their execution is contemplated, if jurisdiction of the territory which they may occupy be claimed as necessary to their preservation and use; the second as asserting the simple right to appropriate money from the National Treasury in aid of such works when undertaken by State authority, surrendering the claim of jurisdiction. In the first view the question of power is an open one, and can be decided without the embarrassments attending the other, arising from the practice of the Government. Although frequently and strenuously attempted, the power to this extent has never been exercised by the Government in a single instance. It does not, in my opinion, possess it; and no bill, therefore, which admits it can receive my official sanction. But in the other view of the power the question is differently situated. The ground taken at an early period of the Government was "that whenever money has been raised by the general authority and is to be applied to a particular measure, a question arises whether the particular measure be within the enumerated authorities vested in Congress. If it be, the money requisite for it may be applied to it; if not, no such application can be made." The document in which this principle was first advanced is of deservedly high authority, and should be held in grateful remembrance for its immediate agency in rescuing the country from much existing abuse and for its conservative effect upon some of the most valuable principles of the Constitution. The symmetry and purity of the Government would doubtless have been better preserved if this restriction of the power of appropriation could have been maintained without weakening its ability to fulfill the general objects of its institution, an effect so likely to attend its admission, notwithstanding its apparent fitness, that every subsequent Administration of the Government, embracing a period of thirty out of the forty-two years of its existence, has adopted a more enlarged construction of the power. It is not my purpose to detain you by a minute recital of the acts which sustain this assertion, but it is proper that I should notice some of the most prominent in order that the reflections which they suggest to my mind may be better understood.