The day’s defining event is the naming of a major north-side tributary — Milk River, in present-day northeastern Montana. All five narrators record passing it. Only Lewis and Clark explain the name; Ordway and Whitehouse repeat the label without its etymology; Gass omits the river entirely.
Who Saw What at the Confluence
Lewis devotes the longest passage of the day to a personal three-mile reconnaissance up the new river, recording width (150–200 yards), depth, bank composition (“a dark rich loam and blue clay”), bed material, and navigability. He then speculates geographically — wondering whether the stream “might furnish a practicable and advantageous communication with the Saskashiwan river.” The naming logic is his:
the water of this river possesses a peculiar whiteness, being about the colour of a cup of tea with the admixture of a tablespoonful) of milk. from the colour of it’s water we called it Milk river.
Clark, walking the larboard shore, climbed “a verry high hill” opposite the mouth and supplied the upstream view Lewis could not get from water level: the river forks 12–15 miles up, one branch running north, the other west of northwest, through “a butifull leavil plain” with buffalo herds. The two captains’ entries are complementary by design — Lewis the hydrographer at the mouth, Clark the topographer on the bluff — and Lewis explicitly credits Clark’s reconnaissance in his own entry.
The Sergeants’ Shorter Record
Ordway and Whitehouse produce nearly identical paragraphs, a recurring pattern in which Whitehouse appears to draw from Ordway’s text. Both give the river as 200 yards wide (Lewis says 150–200; Clark says 150), both report it “2100 miles from the mouth of the Missourie,” both record the alternate name “Scolding,” both note Pryor’s deer and a beaver killed late in the day. Whitehouse adds one detail Ordway lacks — “we Saw a Great deal of beaver Sign all Sorts of Game on each Side” — suggesting he was not merely transcribing.
Neither sergeant explains why the river is called Milk. The whiteness comparison is absent from their journals; they inherit the name without its image. The Minitari designation — “the river which Scolds at all others” — appears in both, but as an alternative label rather than as the ethnographic attribution Lewis and Clark frame it as.
Gass is the outlier. His entry is brief and names only “Warner’s creek” at the night’s camp; the major tributary that anchors every other journal is missing. Whether this reflects his published editor’s compression or Gass’s own field practice, the silence is striking on a day the captains treated as significant.
Sacagawea and the White Apple
Clark alone preserves an ethnobotanical exchange that none of the other four narrators mention:
In walking on Shore with the Interpreter & his wife, the Squar Geathered on the Sides of the hills wild Lickerish, & the white apple as called by the angegies and gave me to eat, the Indians of the Missouri make great use of the white apple dressed in different ways
Lewis notes wild licorice growing on the hills but as a botanical observation, not a foraging episode. Clark’s version is one of the few entries in which Sacagawea appears as an active informant teaching a captain about plant use — a detail that would be lost entirely without his journal. The contrast illustrates how much Indigenous knowledge transfer the expedition recorded only when Clark happened to be the walker.
Distance and Camp
The narrators disagree mildly on mileage: Gass says 25, Ordway and Whitehouse say 27, and the captains do not commit a number. Camp location also splits — Ordway and Whitehouse place camp on the starboard (south) side; Clark records camping on the larboard. The discrepancy is small but typical of the journals’ independent reckoning, and a reminder that even on a day with a major shared event, the five accounts do not converge on a single set of facts.
