Rivière's severed head and hands, buried in a lacquered box, were discovered in the village of Kien Mai, and three weeks later the mutilated body of a European, dressed in naval uniform, was found close to Paper Bridge, near the spot where Rivière had fallen on 19 May.
Kepala dan tangan Rivière yang terputus, terkubur dalam kotak yang dipernis, ditemukan di desa Kien Mai, dan tiga minggu kemudian mayat orang Eropa yang dimutilasi, mengenakan seragam angkatan laut, ditemukan di dekat Cầu Giấy, dekat tempat di mana Rivière jatuh pada tanggal 19 Mei.