of the Lock. After his arrival at Philadelphia, in 1797, Niemcewicz, being soon acquainted with everybody, was generally esteemed; and, on the motion of Jefferson, the American Philosophical Society elected him a member.
Three years after, he married Mrs. Livingston-Kean, a lady belonging to one of the most distinguished families of New-York. In 1802, having received the melancholy intelligence of his father's death, Niemcewicz returned for some time to Poland, in order to settle his family affairs. He published at that time his various works, and was made a Member of the Society of the Friends of Sciences, which had been recently established, and whose highly patriotic labours he henceforward shared with great activity. After his return to the United States, he did not leave that country until the year 1806, at the time when Napoleon was at war with Prussia, and when the French army entered Poland.
The King of Saxony, Sovereign of the Duchy of Warsaw, created by Napoleon, ap-
