Statistics for occurrence #1 of “Gallatin counties” in entry united-states-of-america-montana of Harper's Encyclopedia of United States History:

...the Northern Pacific Railroad, completes the work on that road, by driving the last spike opposite the entrance of Gold Creek into Deer Lodge River......Sept. 8, 1883 Settlement in Deer Lodge and Gallatin counties of monogamic Mormons ex pelled from Utah for apostasy......1883 Constitutional convention meets Jan. 14, 1884, and adjourns Feb. 9; its constitution was ratified by the people Nov. 4, and submitt...
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