Jane proved up a quarter in 35, 8N 48W in 1894. There aren't any Everitt/Everett land claims closer than fifty miles.
Possible - Augusta J. Everett in 1900 Denver, born October 1866 in Germany, with daughter Martha born August 1884 in Germany. Both immigrated in 1889, and have no occupation.
Martha H. Everett married Frank W. Shipman April 18, 1910, recorded in Jefferson County. It's possible this is yet another Martha- this one born in Kansas.