Forgive me . . . I couldn't wait to look at a schedule!

Actually, I have looked this up many times.  If I were going myself, this is what I would choose as the best schedule for a typical Saturday.  But, I would be happy with anything we can come up with!

Train Number   Departs  Time       -   Arrives   Time
     692                      Portland  8am            Boston   10:30am
     695                      Boston    5pm             Portland   7:25pm