Volunteer firemen came from Brooklyn and even Philadelphia to assist in fighting the fire. Explosions took down more buildings as warehouse supplies caught on fire. Meanwhile, marines and sailors from the Brooklyn Navy Yard were brought in for crowd control. Under the command of Captain Walker, they formed a chain of sentinels along South Street, from the Fulton Ferry to Wall Street, up Wall to Exchange. They provided some protection for the goods flung from the burning biuldings. Still many looters made out well during the fire. Somer merchants gave away blankets, hats, and other items to poor citizens who asisted with the rescue of merchandise.
By 12:30 A.M., the fire had progressed towards Wall Street
and threatened the Merchant Exchange. The buildng, made of
marble, was considered fire proof. Three stories high and
spanning 115 feet, it was one of the largest buildings in
the city and was located on the south side of Wall Street.
Inside the main exchange room was a rotunda 75 feet long,
55 feet wide, and 45 feet high. The building had been completed
and first occupied in July, 1827. As the fire progressed,
merchants, not taking any chances, rushed down to retrieve
their merchandise. The building, however, was not immune to
the fire's destruction. At 12:30 A.M., the building began
to smolder; by 2:00 A.M., it was engulfed in flames. Having
little chance to suppress the fire, Gulick ordered his firemen
to help the merchants remove their goods from neighboring
structures, though it was unclear where the fire would strike
next. The financial and commercial district was compeltely
overcome. Even ships along the piers took flame.