These letters concern topics of botany in France.

This item contains a list of plants with brief descriptions, used by Antoine Laurent de Jussieu in public lectures in the Jardin du Roi. The plants are arranged according to the classification which Jussieu published in 1789 under the title "Genera plantarum secundum ordines naturales disposita."

This volume was kept while Piggott was imprisoned by Napoleon at Fontainebleau. Subjects mentioned include astronomy, comets, and botanical gardens.