Mrs. Cornelia Beekman was a daughter of Pierre Van Cortlandt, Lieutenant Governor of New York from 1777 to 1795; and she seems to have inherited her father's zeal for the rights of his country. She was born at the Cortlandt manor house, "an old fashioned stone mansion situated on the banks of the Croton river," in 1752; was married when about seventeen or eighteen, to Gerard G. Beekman; and died on the fourteenth of March, 1847. A few anecdotes will illustrate the noble characteristics of her nature.[36]

When the British were near her residence, which was a short distance from Peekskill, a soldier entered the house one day and went directly to the closet, saying, in reply to a question she put to him, that he wanted some brandy. She reproved him for his boldness and want of courtesy, when he threatened to stab her with a bayonet. Unalarmed by his oath-charged threats—although an old, infirm negro was the only aid at hand—she in turn threatened him, declaring that she would call her husband and have his conduct reported to his commander. Her sterness and intrepidity, coupled with her threats, subdued the insolent coward, and, obeying her orders, he marched out of the house.

A party of tories, under command of Colonels Bayard and Fleming, once entered her house, and, with a great deal of impudence and in the most insulting tone, asked if she was not "the daughter of that old rebel, Pierre Van Cortlandt?" "I am the daughter of Pierre Van Cortlandt, but it becomes not such as you to call my father a rebel," was her dauntless reply. The person who put the question now raised his musket, at which menacing act, she coolly reprimanded him and ordered him out of doors. His heart melted beneath the fire of her eye, and, abashed, he sneaked away.

In one instance, a man named John Webb, better known at that time as "Lieutenant Jack," left in her charge a valise which contained a new suit of uniform and some gold. He stated he would send for it when he wanted it, and gave her particular directions not to deliver it to any one without a written order from himself or his brother Samuel. About two weeks afterwards, a man named Smith rode up to the door in haste, and asked her husband, who was without, for Lieutenant Jack's valise. She knew Smith, and had little confidence in his professed whig principles; so she stepped to the door and reminded her husband that it would be necessary for the messenger to show his order before the valise could be given up.

"You know me very well, Mrs. Beekman; and when I assure you that Lieutenant Jack sent me for the valise, you will not refuse to deliver it to me, as he is greatly in want of his uniform."

"I do know you very well—too well to give you the valise without a written order from the owner or the Colonel."

Soon after this brief colloquy, Smith went away without the valise, and it was afterwards ascertained that he was a rank tory, and at that very hour in league with the British. Indeed Major Andre was concealed in his house that day, and had Smith got possession of Webb's uniform, as the latter and Andre were about the same size, it is likely the celebrated spy would have escaped and changed the reading of a brief chapter of American history. Who can tell how much this republic is indebted to the prudence, integrity, courage and patriotism of Cornelia Beekman?