Magnificent work of Guy Ducourthial who immersed himself in correspondence (and other works) of this great philosopher and we not follow step form, and then train others to botany. We would love collecting plants with the great man who took a real pleasure. We discover another Rousseau, closer, and I must say it got back in my esteem through this livre.Pour read this book when it is better to have even a small interest in botany or for the history of science eighteenth century. But learn that Mr de Malesherbes was a botany enthusiast was a divine surprise!