44 events the sources record for this year, grouped by region.
What happened
China (3)
Winter Solstice Chief Envoy Min Tae-hyeok and others report departure from Beijing (Annals of the Joseon Dynasty 純祖實錄 四年 · 純祖實錄 6책 6권 9장 A면 · 기사 wwa_10402021_001)
In 1804 the Catholic Tsio Siouk-i (a relative of Justin Tsio) was arrested around Nie-tsien county. (Dallet, History of the Church in Korea part_10.txt 줄 61-62)
News reached Korean Catholics that there had been a fierce persecution in Beijing in 1804; rumors mentioned a ban on entering churches, executions of believers and imprisonment of missionaries. (Dallet, History of the Church in Korea part_10.txt 줄 423-426)
Sub-Saharan Africa (1)
Alwali flees to Rano, but the Fulani pursue him as far as Burumai and kill him there; he fought the Fulani for three years. (Kano Chronicle Palmer 1908, Kano Chronicle §XLIII Mohamma Alwali)
The Americas (40)
At four in the afternoon Clark left Camp River Dubois (the starting point across from the mouth of the Missouri) and sailed up the Missouri, camping above the first island (4.5 miles); the party was divided among one large keelboat (20 oars) and two large pirogues. (Journals of Lewis and Clark Clark 1804-05-14 (Thwaites I권 해당일; 글자는 PG8419))
At St. Charles, while Clark wrote out the roster and sent 20 men to the church, Lewis arrived from St. Louis with some gentlemen in a heavy rainstorm and joined them. (Journals of Lewis and Clark Clark 1804-05-20 (Thwaites I권 해당일; 글자는 PG8419))
After lunch with Mr. Dusette they left St. Charles at 3 p.m.; a mile later they met a heavy rainstorm and landed on a point along the bank. (Journals of Lewis and Clark Clark 1804-05-21 (Thwaites I권 해당일; 글자는 PG8419))
Opposite the middle of a river island, at a rock jutting half a mile out where the current strikes, they passed the place called the Devil's Race Ground. (Journals of Lewis and Clark Clark 1804-05-24 (Thwaites I권 해당일; 글자는 PG8419))
Before departing, they heard gunfire at night; the French boatmen guessed it was Whitehouse calling from the forest where he had lost his way. (Journals of Lewis and Clark Clark 1804-05-30 (Thwaites I권 해당일; 글자는 PG8419))
At the mouth of the Osage River they made astronomical observations and measured the two rivers: the Missouri 875 yards, the Osage 397 yards. (Journals of Lewis and Clark Clark 1804-06-02 (Thwaites I권 해당일; 글자는 PG8419))
Rope Walk Camp on the Missouri: at a place of strong current they measured the speed with a stick buoy, then twisted rope and made oars, a maintenance camp. (Journals of Lewis and Clark Clark 1804-06-17 (Thwaites I권 해당일; 글자는 PG8419))
At the mouth of the Kansas River they decided to stay three or four days for observations and to rest the crew, and sent out several hunters. (Journals of Lewis and Clark Clark 1804-06-27 (Thwaites I권 해당일; 글자는 PG8419))
At 4:30 they left the mouth of the Kansas River and resumed their northward journey. (Journals of Lewis and Clark Clark 1804-06-29 (Thwaites I권 해당일; 글자는 PG8419))
Journal entry for 4 July: they passed the mouth of a tributary coming from a lake and stopped to lunch and rest. (Journals of Lewis and Clark Clark 1804-07-04 (Thwaites I권 해당일; 글자는 PG8419))