Bancroft is a small city in Caribou County, Idaho.
Copies of a newspaper entitled the Bancroft Standard for 28 Jan. 1933 through 28 Dec. 1934 are in the Idaho State Historical Society Library in Boise.
The North Gem Journal was a weekly newspaper published in Bancroft. It was advertised as a "supplement to the Soda Springs Sun." Copies for 1 May 1847 through 18 May 1948 (at which time its publication was suspended) are available online at Ancestry.com ($).
Wikipedia page for Bancroft, Idaho.