12:22pm Norman and Jarman "hear the news" , begin their return to TSBD 5th floor.
12:23pm N/J enter rear door of TSBD 1st floor, and walk to the rear staircase
12:24:30 N/J have reached the 5th floor having taken 90 sec to go up 5 flights 18 step staircases, and 80 ft of floor landings
12:24:30- 12:25pm, N/J travel across 5th floor about 150 ft, arriving at their respective windows by 12:25
12:25pm: Bonnie Ray Williams East Elevator from 6th floor arrives on 5th floor. Any earlier, Norman and Jarman are likely seen by BRW or vice versa, walking on the floor, as opposed to already being in place at their windows.
Factoid: Bronson Film presumed to have started at 12:24 pm, 6 minutes prior to JFK motorccade entering DEaley Plaza, shows that there is a box in the window of the SE 6th floor corner window. There is no one seen placing it there. It is ALREADY there, when the Bronson film begins.
Problem: If Oswald had returned immediatelyfrom 2nd floor lunchroom after a 12:17 encounter with Carolyn Arnold, then Oswald was hiding probably on the 6th floor staircase going "up" to 7th floor and waiting for BRW to leave the floor. But how does Oswald get to the SE window by 12:23:30 if BRW is still on the floor and not taking elevator down to 5th floor until 12:25pm?