Charles Floyd Archives - Lewis & Clark Research Database

Sergeant Charles Floyd’s Death: Was It Really Appendicitis?

Wed, 11 Feb 2026 01:27:39 +0000

Dr. Peck provides a thorough medical analysis of the illness and death of Sergeant Charles Floyd on August 20, 1804, near present-day Sioux City, Iowa. Drawing on the detailed symptom descriptions recorded in the journals of Lewis, Clark, Floyd himself, and other expedition members, Peck evaluates the traditional diagnosis of a ruptured appendix against modern medical knowledge. The article examines the progression of Floyd’s symptoms — severe abdominal pain, fever, and rapid deterioration — and considers alternative diagnoses including peritonitis from various causes. Peck concludes that the most likely cause of death was indeed acute appendicitis leading to peritonitis, a condition that would have been fatal regardless of medical intervention available at the time. The article also discusses the expedition’s medical practices and the limitations of early 19th-century medicine.

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Sgt. Floyd’s Last Journal Entry

Tue, 10 Feb 2026 17:34:28 +0000

This brief and poignant entry is among the last written by Sergeant Charles Floyd, who would die just two days later on August 20, 1804. Floyd’s journal, though shorter than the other expedition journalists, provides valuable perspectives on the early weeks of the journey.

“I am verry sick and Has ben for Sometime but have Recovered my helth again.”

Floyd’s optimistic assessment that he had recovered proved tragically wrong. His death, likely from a ruptured appendix, made him the only expedition member to die during the entire two-year journey.

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The Death of Sergeant Charles Floyd

Tue, 10 Feb 2026 17:34:27 +0000

Sergeant Charles Floyd, one of the three sergeants of the expedition and the youngest at approximately 22 years old, died on August 20, 1804 — the only member of the Corps of Discovery to perish during the entire journey.

“Serjeant Floyd Died with a great deal of Composure, before his death he Said to me, ‘I am going away. I want you to write me a letter.'”

Floyd had been ill for several days with what modern physicians believe was acute appendicitis — a condition that would have been fatal even in the best hospitals of the era. He was buried atop a bluff overlooking the Missouri River near present-day Sioux City, Iowa.

Clark named the nearby river “Floyd’s River” in his honor. Patrick Gass was later elected by the men to replace Floyd as sergeant — a remarkable example of frontier democracy within a military unit.

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Setting Out from Camp River Dubois

Tue, 10 Feb 2026 17:34:26 +0000

On May 14, 1804, William Clark led the Corps of Discovery from their winter encampment at Camp River Dubois on the Wood River in Illinois. Captain Meriwether Lewis was still in St. Louis completing final preparations and would join the party later.

The expedition set out in a 55-foot keelboat and two pirogues (flat-bottomed boats), carrying approximately 45 men, including soldiers, French boatmen, and Clark’s enslaved man York. They ascended the Missouri River under a gentle breeze, making four miles on this historic first day.

“I Set out at 4 oClock P.M. in the presence of many of the neighbouring inhabitents, and proceeded on under a jentle brease up the Missourie.”

This entry marks the beginning of one of the greatest expeditions in American history — a journey that would cover over 8,000 miles and last more than two years.

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