Henrietta was born in 1837. She passed away in 1921.
Sources
"Vermont Vital Records, 1760-1954," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XFQY-P9Q : 6 November 2017), Harriet Lessor in entry for Vennault Couture and Marie Dumas, 21 Jun 1881, Marriage; State Capitol Building, Montpelier; FHL microfilm 540,084.