They left the dark river.
Because besides the ogre controlled by Ivita, the rest of the ogres in the underground cavern had been wiped out.
Ivita decided to take action that night.
Otherwise, the Sons of the Forest would soon notice something awry with the ogres, discover the Forbidden Book of Ambros they carried, and realize that they had found out about the secret control of Baron Moro's territory by the Sons of the Forest.
Ivita and her party unhitched the two horses from the wagon for use as mounts, and they wrapped the two named swords in cloth to prevent them from being recognized by the Sons of the Forest.
They also left the pile of coins, with origins and period unknown, on the wagon.
As for the pile of rusted iron, it didn't have much use, but Ivita still took it along just in case they ran into a merchant dealing in recycled iron.
Iron in this era was not cheap; even smelted iron ore could be sold again.
Let alone these swords that were merely rusted.