How does Elie Wiesel's father die in Chapter 8 of Night by Elie Wiesel?

When
they arrive at Buchenwald, Eli's father is
growing ever weaker. Clinging to each other's hands,
they try to keep moving
and keep together. The rumor is making the rounds that they are to have

showers then be sent to barracks. While awaiting an opportunity to join the throng
trying to get
into the showers, Mr. Wiesel collapses on a snowbank in
weakness and exhaustion. Elie screams at
his father to get up and keep trying
but too much has happened to Mr.Wiesel. In delirium, he
responds that Elie
must allow the corpses to sleep and not awaken them with shouting.

Their personal agony is interrupted by the sound of the air raid warning. Elie
runs for
cover in the barracks--foregoing the crush to get into the
showers--discovering in the morning
that his father has not followed him into
the barrack. He feels horror at himself for not
insuring his father's safety.
He goes looking for him. After hours of searching, he finds him
and sees that
Mr. Wiesel has deteriorated significantly since the scene on the corpse
snowbank.
This deterioration ushers in a more rapid decline. He sometimes
cannot recognize Elie. Then, to
add cruelty to pitiless fate, Mr. Wiesel
develops dysentery.

"He is very
sick."
"The doctor won't do anything for
him."
He
looked me straight in the eye. "The doctor cannot do anything more
for him
...."

On the night of January 28th in
1945,
Elie goes to his bunk in exhaustion with his father still alive and
still in the bunk below
him.

I had to
go to sleep. I climbed into my bunk, above
my father, who was still alive.
The date was January 28, 1945 ....

In
the morning, another inmate is in Mr. Wiesel's bunk. Mr. Wiesel had been taken
in
the night--whether dead or still alive--to the crematorium. Elie felt no
tears, only relief
"deep inside":

if I
could have searched the
recesses of my feeble conscience, I might have found
something like: Free at last!

This is
how Mr. Wiesel dies: surrounded by his son's desperation
shrouded in guilt;
exhausted and worn beyond endurance; suffering dysentery and the thirst of

it, with no help at hand; in the night, amidst the rock-hard slumber of those near dead;
perhaps
in a pathetic bunk, perhaps in the
crematorium.