Zook and Rethlin maneuver the party past the paradoxical four-dimensional constructs into Terminus station, a three-dimensional construct scarcely less paradoxical in some ways.
Considering it serves as the gateway to the fastest means of transport in Khorvaire -- the lightning rail, the earth-sled, the mail wagons pulled by crack relays of mage-bred horses -- there's an astonishing quantity of standing about in long slow lines to get anywhere.
Even late at night, which is when the party arrives
It's time for the party to pick a line.
No earthsleds will be going to First Tower until noon, barring an very special (and expensive) charter.
The midnight mail will be going to First Tower in about 10 minutes: if you can figure out how to get seats in time it will be the cheapest mode of transport to First Tower, and competitive in arrival time with the Lightning Rail.
The Rail is cheaper and goes faster, but won't leave until 230 am: that lead means it will arrive at First Tower at very nearly the same time as the mail.
What does the party do?