ST. LOUIS GLOBE-DEMOCRAT, Oct. 29, 1884  

* Polygamist - polygamy trial
* Mormons - Mormonism 

The bottom of page 3 has: "Indicted for Polygamy" which includes: "Henderson, three times tried at Malad, Idaho, for polygamy under the Edmunds law, has just been convicted of cohabiting with more than one woman in the marriage relation..." and a bit more. 
The Edmunds Act is a federal statute, signed into law in 1882 declaring polygamy a felony in federal territories.
Twenty pages, very nice condition.