According to the Wyoming State Historical Society, John Campbell was sworn in as the first Wyoming territorial governor on April 7, 1869. Fifty-three years later, also, on April 7, ground was broken for the town of Parco, which is now Sinclair.

The Historical Society also writes that Cheyenneites were chided on April 3, 1890, for using too much water.

The Wyoming Derrick in Casper wrote on April 5, 1900, that Wyoming State Engineer, Professor Elwood Mead, would be one of the country's representatives heading to "the Paris Exposition" in May. The exposition was a world's fair.

The Weekly Boomerang in Laramie reported on April 3, 1902, that the Bell telephone company's line from Cheyenne to Douglas to Casper was progressing rapidly. Poles had already been erected within three miles of Casper.

The Cheyenne Daily Leader reported on April 7, 1907, that the first seed drill in Shoshoni was at work at the Dave Sidenbender homestead on the edge of town.