...rom the artillery in a monitor car, on the track of the bridge. After two hours he reached the bridge, and under a heavy fire, Lieut. Graham, Twenty-third New-York battery, acting as aid-de-camp to Col. Heckman , fired the bridge. All who had attempted it were picked off, as was wounded Lieutenant B. N. Mann, Seventeenth Massachusetts, who accompanied him. I brought all my artillery to bear to prevent ...