Separate distance from duration
A map can show that two places are separated without proving how long a particular person took to travel between them. Transport, route, stops and conditions may matter, and the file may leave some of them unknown. Do not import a real-world journey estimate into a fictional setting unless the case explicitly supports that comparison. State the travel assumption before using it to exclude anyone.
Worked example: the causeway stop
A message says a person is leaving at 09:00, while a receipt places their account at a café at 09:40. The message may mean leaving an office rather than leaving the city. The receipt may record a stop before the main journey. Calling the sequence impossible requires more than an intuition about how quickly someone should have crossed a map.
Look for useful anchors
Search the supplied records for departures, arrivals, route closures, transport schedules or direct statements about the journey. Keep unsupported intervals open. A theory can still be tested against confirmed anchors without assigning a speed to every movement. In Somatry, the strongest timeline is one you can trace back to the file. If its crucial exclusion depends on a travel duration you invented, revise the claim or identify the evidence that would be needed to support it.