She was the daughter of Robert and Mary (Hanscome) Gray. She married Albert Clark and they had a son, Wilbur. She died when Wilbur was 2 years old.
Sources
BIRTH - "Vermont Vital Records, 1760-1954," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XFSX-W3J : 6 November 2017), Mira Mabell Gray, 03 Nov 1874, Birth; State Capitol Building, Montpelier; FHL microfilm 540,094.
United States Census, 1880, Sheffield, Caledonia, Vermont
MARRIAGE -"Vermont Vital Records, 1760-1954," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XFSC-771 : 6 November 2017), Albert J. Clark and Myra M. Gray, 21 Feb 1900, Marriage; State Capitol Building, Montpelier; FHL microfilm 540,094.
DEATH - "Vermont Vital Records, 1760-1954," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XFWF-693 : 11 February 2018), Myra H. Gray Clark, 23 Jul 1904, *Death; State Capitol Building, Montpelier; FHL microfilm 540,074.