Read the second paragraph from Muir's essay "Calypso Borealis" and answer the question.

[2] The rarest and most beautiful of the flowering plants I discovered on this first grand excursion was Calypso borealis (the Hider of the North). I had been fording streams more and more difficult to cross and wading bogs and swamps that seemed more and more extensive and more difficult to force one's way through. Entering one of these great tamarac and arbor-vitae swamps one morning, holding a general though very crooked course by compass, struggling through tangled drooping branches and over and under broad heaps of fallen trees, I began to fear that I would not be able to reach dry ground before dark, and therefore would have to pass the night in the swamp and began, faint and hungry, to plan a nest of branches on one of the largest trees or windfalls like a monkey's nest, or eagle's, or Indian's in the flooded forests of the Orinoco described by Humboldt.

What happens in this paragraph?

Muir discovers the beautiful Calypso Borealis in the branches of a tree in the swamp.
Muir encounters a large monkey's nest and an abandoned Indian's shelter in the forest.
Muir explores eagerly but begins to worry he will have to stay the night in the swamp.
Muir falls into the murky swamp water and becomes discouraged with his predicament.