Re: How many Stars did the Flag have that flew at the original Golden Spike ceremony?
Per the attached list, there were 37 states in 1869, Nebraska having joined in 1867.
The ... WH Jackson photo appears to show stars ranked in 4 rows, 5 across, suggesting 20 stars on the flag.
Other photos showing the flag include the following:
AJ Russell Imperial view 225 Laying of Last Rail
Stereo view 538 Space left for the last rail at Promontory, Utah
Also check out the view down the side of the Jupiter (Imperial 223 at Oakland Museum?), with all the small flags on the hand rail and running board.
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Kyle K. Wyatt
Curator of History & Technology
California State Railroad Museum