Fort Mandan, North Dakota — Patrick Gass: November 21, 1804

proceeded on four miles along bluffs on the south side, when
we came to the termination of the Grand bend, about a mile
from the place of our encampment on the 19th. We again
went on, having black bluffs on the south, and a handsome
bottom on the north side ; and beyond these a cedar bottom
on the south side and bluffs on the north ; passed a creek on
the south side, called Tyler’s creek; and encamped on the
north side.