Letter from Lalande to Mme. Dupiery in Paris on January 2, 1801. Lalande writes an intimate letter to Mme. Dupiery detailing his warm feelings towards her and her friendship. He hopes for a safe journey and return. He addresses her with tenderness.

Letter from Lalande in Paris to Mme. Dupiery in Paris on January 22, 1801. Lalande writes about his advancements with chemistry and the table, specifically the placement of different elements. He has made plans to come to Paris and stay with a good friend, Raimondis. He recounts that 200 aristocrats in the past 2 days have been linked with the Machine Infernal incident. Lalande has a new commission to place the position of stars.

Letter from Lalande in Brussels to Mme. Dupiery in Paris on August 25, 1801. Lalande has arranged to make a quick visit to Belgium and stay with M. and Mme. Gohier. M. Gohier is the old director of the French Directory.

Letter from Lalande in Belgium to Mme. Dupiery in Paris on May 16, 1802. Lalande continues his work on the chemistry table. He is specifically continuing the work of Boudouin. However, while staying with Gohier in Belgium he is forcibly removed over a disagreement. Lalande claims Gohier to be both a hypocrite and scoundrel. Lalande also mentions a new muse in Mme. Foliveau.

Letter from Lalande in Brussels to Mme. Dupiery in Paris on November 1, 1802. Lalande publishes his fourth edition of his History of Astronomy. He also writes that he is returning to the University of Paris on a Thursday to hear the lecture: "Crazy he calls his wife" by Delille.

Letter from Lalande in Paris to Mme. Dupiery on January 18, 1803. He is wishing to give praise to a fellow scientist. He is praising the author of the second volumne of the dictionary of gases. This dictionary covered the gases associated with the sun.

Letter from Lalande in Paris to Mme. Dupiery in Paris on May 31, 1804. Lalande details his stay with a cousin. He also mentions Abbie Bernier and how he fears the state of comma of the French public.

Letter from Lalande in Paris to Mme. Dupiery in Brie on October 28, 1805. Lalande feels that secession is inevitable in France. He also sends Mme. 1,000 tendernesses from himself, his muse, and his cousin.

Letter from Lalnde in Paris to Mme. Dupiery in Montaubar on March 27, 1806. Lalande writes Mme. Dupiery after a long break in their correspondence. He writes that he will accept her invitation willingly. Also that Mme. has been a great companion -best in the world- to him.