author
A 19th-century French writer with a sharp interest in honor, law, and military life, he is best known for a detailed study of dueling that blends history with legal commentary.

by comte Charles Du Verger de Saint-Thomas
Charles Du Verger de Saint-Thomas appears in library records as a French author active in the 19th century. Surviving bibliographic sources clearly connect him with Nouveau code du duel: histoire, législation, droit contemporain, published in 1879, a substantial work on the history and legal treatment of dueling.
Another recorded work, Lettre sur l'armée sarde, was published in 1855 and presents him as a close observer of military affairs. Taken together, these books suggest a writer interested in discipline, conflict, and the rules that shape public and private notions of honor.
Reliable biographical detail about his personal life is scarce in the sources I could confirm, so it is safest to remember him through his writings: practical, historically minded, and focused on the codes that governed violence and reputation in his era.