The correct answer to this open question is the following.
Thomas Jefferson’s tone in the letter to Robert Livingston was on interest in acquiring the city of New Orleans, knowing that probably it could be difficult for the United States to own the Louisiana territory in the nads of the French. The United States President Thomas Jefferson also knew that the Florida peninsula -in that time, controlled by the Spanish crown- was not a priority to be part of the United States.
Jefferson really wanted to acquire New Orleans because of its strategic location in the Mississippi River and its importance for trade, transportation, and territorial security.
On April 18, 1802, Jefferson wrote this letter to Robert R, Livingston, who was the United States minister to France. The letter includes encoded information that Livingstone had to decipher.