According to the W.T.T., the 13.39 up Lilydale is scheduled to arrive on
Platform 3 at 14.36 (Flinders Street) to form the 14.44 down Belgrave.
May I stress that this assumes the Metrol does not altered the train
running. My suggestion (to deal with the unexpected platform arrival)
is to meet your son at Richmond (arr. 14.32 on platform 8 and if Metrol
decides to make a last minute alteration, it would arrive on platform
7). This way, the chance of meeting your son is far better than at
Flinders Street, because that train could arrive on one of the platforms
between 1 and 9!!
Cheers,
I.C.