Read it through once

We were busy and never heard the five cannon-shots fired, but they were fired a moment after Joan had ordered the assault; and so, while we were hammering and being hammered in the smaller fortress, the reserve on the Orleans side poured across the bridge and attacked the Tourelles from that side. A fire-boat was brought down and moored under the drawbridge which connected the Tourelles with our boulevard; wherefore, when at last we drove our English ahead of us and they tried to cross that drawbridge and join their friends in the Tourelles, the burning timbers gave way under them and emptied them in a mass into the river in their heavy armor—and a pitiful sight it was to see brave men die such a death as that.