The missing letter!!

A young monk arrives at the monastery. He is assigned to helping the
other monks in copying the old canons and laws of the church by hand.
He notices, however, that all of the monks are copying from copies,
not from the original manuscript. So, the new monk goes to the Abbot
to question this, pointing out that if someone made even a small error
in the first copy, it would never be picked up! In fact, that error
would be continued in all of the subsequent copies.

The Abbot says 'We have been copying from the copies for centuries,
but you make a good point, my son.'

He goes down into the dark caves underneath the monastery where the
original manuscripts are held as archives in a locked vault that
hasn't been opened for hundreds of years.

Hours go by and nobody sees the old Abbot.

So, the young monk gets worried and goes down to look for him. He sees
him banging his head against the wall and wailing.

'We missed the R! We missed the R! We missed theR!'

His forehead all bloody and bruised and he is sobbing uncontrollably.
The young monk asks the old abbot, 'What's wrong, father?'

With A choking voice, the old abbot replies, 'The word was...

'CELEB R ATE!!!'