"Aerial view of Fort Jefferson, Florida in 1993" by U.S. National Park Service , public domain
The Underground Railroad at Fort JeffersonDry Tortugas |
The Underground Railroad at Fort Jefferson at Dry Tortugas National Park (NP) in Florida. Published by the National Park Service (NPS).
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Dry Tortugas
National Park Service
U.S. Department of the Interior
Dry Tortugas National Park
The Underground Railroad at Fort Jefferson
Shortly after midnight on July 10, 1847, seven enslaved African Americans fled Garden Key.
Over the lengthy construction of Fort Jefferson, large numbers of enslaved workers were
employed by the Army. The conditions were harsh, and the hopes of escape virtually nonexistent. Freedom seekers faced incredible odds. Surrounded by miles of open sea and
treacherous reefs, perhaps no area in North America presented greater challenges to selfemancipation. Undaunted by these long odds, seven men set out to do the impossible.
Underground Railroad
Network to Freedom
The National Underground Railroad Network
to Freedom Program recognizes important
efforts of enslaved African Americans to gain
their freedom by escaping bondage. The
Network to Freedom Program celebrates the
heroism of freedom seekers, and acknowledges
the people of all races who risked everything to
make these dreams come true. Together, they
endured the unendurable; together, they helped
to change the future.
The courageous efforts of the seven men who
fled from bondage at Fort Jefferson were
honored by the National Underground
Railroad Network to Freedom Program. Their
attempt offers proof that wherever slavery
existed, even at the most remote military
outposts, the thirst for freedom could not be
quenched. Because of this dramatic 1847
self-emancipation attempt, Fort Jefferson is a
proud member of the program.
Fort Construction
Built to protect the strategic Tortugas
Anchorage, Fort Jefferson was a vital link in a
chain of coastal forts that stretched from Maine
to California. One of the largest coastal forts
ever built, Fort Jefferson also ranked as one of
the most remote. Its builders faced numerous
hardships, including storms, shifting sands, and
disease. The remote location often hampered
the shipment of supplies and workers.
they offloaded arriving ships. Ultimately, 16
million bricks were used in the fort’s
construction. Perhaps their most arduous task
was collecting and transporting large quantities
of coral rock from nearby islands. This coral
material served as the main ingredient in
forming coral concrete, a vital component in the
fort’s construction. Several of the enslaved men
were permitted to bring their wives with them.
These women often served as cooks and
laundresses.
Enslaved African Americans played a key role
in the construction of Fort Jefferson. Typically
20% of the workforce was comprised of African
Americans, hired from owners in Key West.
Owners were normally paid $20 per month per
slave, with the Federal government agreeing
to provide food, shelter and medical attention
for the slave workforce. One of these owners
was Stephen Mallory, a U.S. Senator and future
Confederate Secretary of the Navy.
Enslaved African Americans were responsible
for some of the most difficult tasks at Fort
Jefferson. They labored ten hours a day, six days
a week. Using little more than wheelbarrows
More than a dozen Federal fortifications along
the Gulf Coast and South Atlantic employed
slave labor. An estimated 687 enslaved laborers
were employed by the U.S. Army Corps of
Engineers on these projects. Florida slave
owners were assured that they would be given
preference for the Fort Jefferson project.
Anticipating profitable contracts with the
government, local owners rushed to purchase
additional enslaved workers. The work force at
the fort reached its highest point in December
1857, with a total of 299 workers, including 58
enslaved peoples.
The Escape
Early on July 10, 1847, under the cover of
darkness, seven freedom seekers named Jerry,
Jack, John, George, Ephraim, Howard and
Robert fled Garden Key. They took with them
every vessel that could float, a brilliant move
that greatly reduced the risk of being pursued
and captured. Without being detected the seven
men removed the schooners Union, Virginia,
and Activa, and a small boat belonging to the
Garden Key lighthouse keeper.
smashing their hulls. Their escape went
completely undetected until daylight when the
boats and enslaved workers were reported
missing. Minutes later the Union was spotted
from the Garden Key Lighthouse. By 7:00 AM,
the freedom seekers had traveled fifteen miles,
and were spotted three miles west of
Loggerhead Key heading south.
Garden Key Lighthouse, c.1867
(NPS, DRTO 300889)
Soon after fleeing Garden Key and entering the
Loggerhead Channel, they disabled and
abandoned the Virginia, the Activa, and the
lighthouse keeper’s boat by cutting and
The Pursuit
The Capture
Freedom at Last
With Lieutenant H.G. Wright away on
business in Key West, Dr. Daniel W. Whitehurst,
his second in command, organized the pursuit.
Because of the freedom seekers’ thoroughness,
only one old condemned vessel, the Victor,
remained near the island. Work on refastening
and caulking the Victor began immediately, and
within two hours the vessel was repaired and
outfitted.
the jib of the Union, cut away both masts, and
disabled the rudder. At approximately 2:00 PM
they scrambled into a small boat from the Activa
and began “pulling to the southward with great
force.” On board they carried a compass, clothing, spyglass, axes, and a small barrel of water.
By 9:00 AM the repaired Victor started in
pursuit. On board were eight men led by
lighthouse keeper Captain John Thompson.
Since there was no wind, oars were hastily made
and the men began an exhausting chase. Four
hours later they had closed to within three
miles of the Union. The freedom seekers, after
making several course changes, hauled down
Thompson and his crew continued the pursuit
for several more hours until they lost sight of
the lighthouse. Concerned because of a
rapidly developing storm, the crew of the
Victor returned to Garden Key by midnight.
As the weather continued to deteriorate, Dr.
Whitehurst waited and pondered the fate of the
escapees. Understandably impressed with the
careful planning and execution of the escape
attempt, he speculated that their destination
was the Bahamas.
The seven freedom seekers survived the
powerful storm, but their hazardous journey
was only beginning. They traveled eastward
through the Straits of Florida where they were
spotted two days later by a local captain near
the island of Key Vacas (present day Marathon),
nearly 120 miles east of the Dry Tortugas.
to frighten the fleeing men. To avoid capture,
the freedom seekers ran for the beach on the
other side of the island, near Indian Key, and
then desperately fled into the water. The chase
finally came to an end as a boat from the sloop
Key West picked the fleeing men from the water
and took them to Key West.
An alarm was spread on Key Vacas, and several
vessels began chase. The following day the boat
was discovered on the beach at Long Key
several miles to the east. Coming ashore, the
pursuers began firing their weapons in an effort
After an exhausting journey, the men had
ultimately failed in their quest for freedom.
Two leaders in the group were returned to their
owners, and the remaining five men were sent
back to Fort Jefferson.
Enslaved African Americans endured
countless hardships during the construction of
Fort Jefferson. By 1863, with the arrival of
hundreds of military convicts sentenced to
perform hard labor, the use of enslaved peoples
was discontinued at this remote outpost.
African Americans returned two years later, not
in bondage, but as soldiers. No longer denied
their freedom, by 1865 African Americans had
become the guardians of freedom.
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