The sixteenth of July 1804 produced an unusually full documentary record: all six expedition diarists logged the day, though Whitehouse’s entry telescopes three days together and must be read with care. The Corps moved roughly twenty miles up the Missouri under a south wind, passed Fair Sun Island, struck a sawyer, observed a recent landslide, drifted under a sandstone cliff full of nesting birds, and camped opposite the Bald-Pated Prairie. What each narrator chose to record — and what each omitted — reveals the division of observational labor that was settling into place six weeks into the journey.
The Geologists, the Surveyor, and the Sailors
Clark, in both his field and fair-copy versions, produces by far the longest entry and assumes the role of landscape cataloguer. He numbers his observations (1) through (5), names Fair Sun Island and Isle Chauvin, and gives the Bald-Pated Prairie its name from the range ball hills, at from 3 to 6 miles from the river as far as my Sight will extend.
Ordway echoes Clark’s geography closely — naming Fair Sun, the sand bank which appeared to be slideing in at times,
and the sandstone with many Birds Nests in the holes
— but adds an ethno-geographic detail Clark omits: the Nemaha-region tributary, which he renders neesh-nah-bo-to-na,
running behind the bottom prairie with timber standing in Handsome Groves.
Lewis, by contrast, writes almost nothing about landscape. His entry is purely an instrument log: he could find no convenient situation for observation
in the cloudy morning, took a meridian altitude with the octant by back observation opposite Good Island yielding latitude 40° 20′ 12″ N,
and set the chronometer. The two captains’ entries for this date are nearly complementary — Clark the topographer, Lewis the surveyor — and read together they reconstruct the day more completely than either alone.
Gass, Floyd, and the Compression of Detail
Gass and Floyd both write short. Floyd’s entry is the most compressed of the day — barely thirty words — but he alone among the enlisted men flags that Sailed ouer Boat Run on a Sawyer / Sailed all day made 20 miles.
Gass adds a detail Clark and Ordway also note but phrases more vividly: a place where the bank has slipped into the river,
with high rocky cliffs on the south side, and hills and prairies on the north.
Gass also gives the river width independently — two miles wide with rapid water
— matching Clark’s measurement and corroborating it from a non-officer’s vantage.
Whitehouse’s entry is the day’s anomaly. He compresses July 16, 17, and 18 into a single block, and his July 16 portion — Camp’d on the Mohaugh prarie
after twenty miles past islands and elk on the east shore — diverges from the others in placing elk sightings nobody else mentions. The entry then jumps to the latitude observation taken near the Bal’d pate hills,
which the other narrators place on the seventeenth, suggesting Whitehouse wrote retrospectively from memory or from a borrowed source and conflated dates. The usual Whitehouse-from-Ordway pattern is weaker here than on many days; his prose preserves vocabulary (“Mohaugh”) not in Ordway’s entry at all.
What Only the Composite Reveals
No single narrator captures the full sandstone-cliff scene. Clark notes the cliff continues two miles and is the resort of burds of Different Kinds to reare their young.
Ordway independently observes the many Birds Nests in the holes.
Gass mentions the cliffs but not the birds; Lewis, Floyd, and Whitehouse omit the feature entirely. The slumping bank is recorded by Clark (about 20 acres of the hill has latterly Sliped into the river
), Ordway, and Gass, but each estimates differently: Clark gives acreage, Ordway notes ongoing motion, Gass gives only location. The Nemaha tributary appears only in Ordway. The latitude appears only in Lewis. The sawyer strike appears in Ordway, Floyd, and Clark but not Lewis or Gass.
The day demonstrates how thoroughly the expedition’s documentary value depends on cross-narrator redundancy. A landslide, a sandstone bird-cliff, a named island, a tributary, and a celestial fix — five distinct categories of evidence — survive only because five different men were watching for five different things.
