fellows of peterhouse were familiar with (and were indeed known to imitate) the slight sideways vibration of the body which betokened amusement and often precluded a mildly ironical or deflationary quip.

Write the above sentence using proper case.
Fellows of Peterhouse were familiar with (and were indeed known to imitate) the slight sideways vibration of the body which betokened amusement and often precluded a mildly ironical or deflationary quip.