|Peculiarly, this timetable is undated (an omission which must have aggravated potential passengers who consulted it in say, 1918, and showed up at the depot to find that the schedule had changed in 1916), but we can say with fair certainty that it dated from 1915. Note that the cover heralds Southern Pacific as "The [Panama-California] Exposition Line", and a couple of cryptic entries at the bottom of the last page (pg. 31) seem to indicate that the document dates from mid-1915, June or September.
Of interest: The header of the SPde Mexico timetables (page 21) states the following :
NOTE - ACCOUNT REVOLUTIONARY TROUBLES, SERVICE UNCERTAIN - ENQUIRE OF AGENTS FOR LATEST REPORTS.
This would seem to indicate that the timetable dated from late 1915, since Pancho Villa briefly entered Sonora in October.
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