フォート・リサ（ノースダコタ州）

ジョン・ブラッドベリーは1811年にフォート・リサを訪れ、次のようにスケッチした。

「砦は四角いブロックハウスで構成されており、下部は毛皮の保管室、上部はルイス氏とこの施設に所属する猟師数名が住んでいた。小さな付属小屋がいくつかあり、全体は高さ約15フィートの柵で囲まれていた。私はそのそばにとてもきれいな庭を見つけ、そこにはエンドウ豆、インゲン豆、サラダ、大根、その他の野菜が植えられていた…」^{[ 4 ]}

Employees of the Pacific Fur Company visited Fort Lisa on the 23 June 1811.^[5] The fellow fur trappers were received favorably by Reuben Lewis, brother of Meriwether Lewis. Ramsay Crooks commanded the group and was sent by W. Price Hunt after making an agreement with Lisa to purchase horses. Fort Lisa was noted to have minimal food supplies at the time.^[5] Lisa arrived at the fur trading post on the 25th of June and finalised the transaction with Crooks. Crooks and his employees departed the following day to the Arikara nation, where the majority of the PFC workforce was residing.^[6]

Henry Brackenridge during 1811 wrote in his journal that Sacagawea, the notable Native American guide for the Lewis and Clark Expedition, was living at Fort Lisa with her husband Charbonneau. He wrote that Sacagawea "...had become sickly and longed to revisit her native country." The following year, John Luttig, a clerk at Fort Manuel Lisa, recorded in his journal on December 20, 1812, that "...the wife of Charbonneau, a Snake Squaw, died of putrid fever." (Note: Often called childbed fever, this was a frequent complication of childbirth.) Luttig noted that she was "aged about 25 years. She left a fine infant girl."^[7][8] Charbonneau had already entrusted his and Sacagawea's son Jean Baptiste into Clark's care for a boarding school education. Clark was fond of the boy and offered to support his education. ^[9]

Difficulties with certain Indigenous nations and shipping at this location meant that by 1812, Fort Lisa ceased to be utilized by the MFC.^[10] Lisa built a third fort downriver about 12 miles north of present-day Omaha in that year. He named this Fort Lisa, too, and shifted his operations to this location. This became the main post of the Missouri Fur Company and its successors under various names.