Also in 1990, French author Daniel Hémery found Ho's letters to Zeng in the Centre des Archives d’Outre-Mer, the French colonial archive.
Selain itu, pada 1990, penulis Prancis Daniel Hémery menemukan surat-surat Ho utnuk Zeng di Centre des Archives d’Outre-Mer, arsip kolonial Prancis.