The July 15 record splits cleanly along a line of professional preoccupation. Lewis spends his entire entry inside the brass case of his chronometer; Clark and Ordway walk seven miles overland through fruit-laden prairie; Floyd and Whitehouse compress the day into terse riverman’s shorthand; Gass alone preserves a small geological detail no one else mentions. Read together, the entries show how unevenly the same Sunday was witnessed.
Lewis Alone with the Instrument
Lewis writes nothing about the river, the weather, the fog that delayed departure, the creeks crossed, or the fruit gathered. His sole concern is mechanical:
This evening I discovered that my Chronometer had stoped, nor can I assign any cause for this accedent; she had been wound up the preceding noon as usual. This is the third instance in which this instrument has stopt in a similar manner since she nas been in my possession, tho the first only since our departure from the River Dubois.
The passage is the day’s most revealing document of expedition method. Lewis reasons from prior failures — the chronometer’s rate after restart had twice proved identical at 15.5 seconds slow per 24 hours — to conclude the works are uninjured. He then resolves to halt at the next convenient place to re-establish latitude, longitude, and magnetic variation, fixing what he calls “a second point of departure.” None of the other five narrators registers that the expedition’s celestial reckoning has just been disrupted. The captains’ division of labor is total: Lewis owns the sky and the instruments; Clark owns the ground.
Clark and Ordway on the Same Walk
Clark and Ordway both went ashore on the south side and clearly walked together for at least part of the morning, yet their entries diverge in emphasis. Clark, writing in two versions, focuses on the panoramic view from a high prairie ridge — “on S. a contnuation of the plain as far as I could See, on the N. a bottom Prarie of about 5 ms. wide & 18 or 20 long” — and inventories fruit: grapes, plums, two kinds of wild cherries, hazelnuts, gooseberries. Ordway records the same walk as a sequence of named waypoints: Faun Creek, Cherry Run (drunk from at the forks), the Nemahaw, and a high ridge “where we could See all around for a long distance.” Ordway names creeks Clark only counts (“three butifull Small Streams”), suggesting the naming may have happened in conversation that Clark did not transcribe.
The two accounts confirm each other on the Ne-ma-haw’s width — Clark gives 40 yards, Ordway 30 — and on Clark’s swim across it. Ordway adds a detail Clark omits: “the flanking party who were with the horses did not join us this night, J° Fields went out on the North Side & killed a Deer.”
The Compressors and the Outlier
Floyd, Whitehouse, and Gass each reduce the day to a few lines, but they do not reduce it identically. Floyd names a “Plumb Run” with “water verry Strong” that no other narrator records. Whitehouse mentions the Nishnabotna and a “little Mohaugh” — likely a garbled Nemaha — and reports eleven miles, the only mileage figure of the day. Gass, characteristically, preserves the one detail that the literate captains and the diligent sergeant all skipped:
At the head of an island, called Elk island, we found some pummice stone among the drift wood.
Pumice in Missouri River drift is a geological observation of real consequence — it implies volcanic source rock somewhere upstream — and Gass is alone in noting it on this date. The pattern is consistent with his record elsewhere: shorter entries, but frequently containing a hard physical particular the others overlook.
The Whitehouse entry on this date is unusually thin and does not show the close parallelism with Ordway that often marks his journal, perhaps because Whitehouse stayed with the boat while Ordway walked. What survives across all six is a Sunday on which the expedition advanced perhaps eleven river miles, paused under fog, gathered ripe fruit, and quietly lost — then planned to recover — its grip on absolute time.
