Washington, April 15, 1861.
SIR: Under the act of Congress "for calling forth the militia to execute the laws of the Union, suppress insurrections, repel invasions," &c., approved February 28, 1795, I have the honor to request Your Excellency to cause to be immediately detached from the militia of your State the quota designated in the table below, to serve as infantry or riflemen, for the period of three months, unless sooner discharged.
Your Excellency will please communicate to me the time at or about which your quota will be expected at its rendezvous, as it will be met as soon as practicable by an officer or officers to muster it into the service and pay of the United States. At the same time the oath of fidelity to the United States will be administered to every officer and man. The mustering officer will be instructed to receive no man under the rank of commissioned officer who is in years apparently over forty-five or under eighteen, or who is not in physical strength and vigor. http://www.civilwarhome.com/lincolntroops.htm