Editor Charles King decided to seek out the mayor. As he wandered the streets, amid flames, destroyed buildings, abandoned fire equipment, and looters helping themselves to piles of goods saved from ruin, King was shocked by the level of destruction. He located Mayor Lawrence with several civic leaders at what is today Exchange Place. King urged the mayor to use his power to blow up private property to curb the further spread of the fire. After much hesitation, the mayor and aldermen decided that it was the right course of action. King and Colonel Robert Temple, an off-duty army officer, agreed to search for gunpowder. King successfully secured explosives from the commodore of the Navy Yard., who ordered a few sailors to deliver it by barge from Red Hook, Brooklyn to Manhattan. Colonel Temple also retrieved some gunpowder from Governor's Island and brought it back to Manhattan himself in a tiny rowboat.
The gunpowder barge arrived at the foot of Wall Street. Charles
King and the mayor arrived soon after. Some time between 2
and 3 A.M., the Mayor called for a former chief general of
the US Army Corps of Engineers, Captain James Swift to identify
buildings that could be demolished to halt the spread of the
fire and to supervise the project. A grocery store at 48 Exchange
Place, near the intersection of Exchange and Broad Street,
was chosen. The officials hoped that by destroying this building
they might prevent the fire from jumping Broad Street and
moving westward and northward, which would threaten the residential
neighborhoods near the financial district. At about 5 A.M.,
the powder kegs had been laid and the fuse was ready to be
lit. The mayor, still uneasy with his decision, attempted
to get the fire chief Gulick to set off the explosion. Gulick
refused, so James Hamilton, Alexander Hamilton's son, lit
the fuse. As hoped, the building exploded, but it, unfortunately,
set the building next to it, 50 Exchange Place, on fire. The
building at 52 Exchange Place was also filled with explosives
to help stem the fire. By the end of the night, several more
buildings had been intentionally set ablaze, finally deprving
the fire of fuel.