  In the paper [7] we studied the temporally inhomogeneous system of
non-colliding Brownian motions and proved that multi-time correlation functions
are generally given by the quaternion determinants in the sense of Dyson and
Mehta. In this report we give another proof of the equivalent statement using
Fredholm determinant and Fredholm pfaffian, and claim that the present system
is a typical example of pfaffian processes.
