April, 1811, the full and exclusive right and liberty of making, constructing, using and vending to others to be used, the said improvement; a description whereof is given in the words of the said Jacocks Swain, Henry Swain and Joshua Swain themselves, in the schedule hereunto annexed and is made a part of these presents.
"In testimony whereof, I have caused these letters to be made patent and the seal of the United States to be hereunto affixed.
"Given under my hand at the City of Washington, this tenth day of April, in the year of our Lord one thousand eight hundred and eleven, and of the Independence of the United States of America the thirty-fifth.
"By the President, Jas. Monroe, Secretary of State."
"City of Washington, to wit:
"I do hereby certify that the foregoing letters patent were delivered to me on the tenth day of April, in the year of our Lord, one thousand eight hundred and eleven, to be examined; that I have examined the same and find them conformable to law; and I do hereby return the same to the Secretary of State within fifteen days from the date aforesaid, to wit: on this tenth day of April, in the year aforesaid.
"C.A. Rodney, Attorney-General of the U.S."
The schedule referred to in these letters patent,
