There is one thing wrong with the way tha 19 is written.that is the word coupled. A double header the lead engine was the numbers that would be used.It should read like this.
To C&E Extra 200 west at Summers.
Take siding at Summers.Do not proceed untill extra 206 east clears.
---------------------------------------------------------------------------------- Very seldom would you see a set time.What if extra 206 didn't show up at say 11:45 am?
Form 19s was used for instructions and speical movements by train crews. Like:
To C&E extra 200 west.at Summers
Do not exceed ten(10) mph between MP231.0 and 231.5 Account broken rail.
or
To C&E Extra 200 west.At Summers
Run number number 2 main from MP230.0 to 235.9 . Do not exceed fifthteen(15) mph.between MP231.0 to 231.7 cross over to #1 main at mp235.9
Watch for track workers between MP231.0 and 231.7. Use whistle and bell.
Now you would see time used like this.
To C&E extra 200west.At Summers.
You may occupy main number 2 from 12:45 pm to 1:15pm between MP230 and 230.5. Do not proceed beyond signal at MP 230.5. Clear number 2 main no later then 1:15 pm.
You can see how important and cleary written a form19 had to be.
Nothing was to be left in question..