Chapuis, p.5 Google Book Quote: Two years later, in 1847, Lefebvre was again captured when he returned to Vietnam. This time Cecille sent captain Lapierre to Danang. Whether Lapierre was aware or not that Lefebvre had already been freed and on his way back to Singapore, the French first dismantled masts of some Vietnamese ships. Later on April 14, 1847, in only one hour, the French sank the last five bronze-plated vessels in the bay of Danang.
