You didn't provide any location - Country >Province/Region/State or any timeframe of b, m, d so this may or may not be the correct Lemuel Gilman Sargent, son of Daniel Sargent and Helen/Ellen Harrington.
New Hampshire, Marriage Records, 1637-1947
Citing this Record: "New Hampshire, Marriage Records, 1637-1947," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/FLXT-TW7 ), Lemuel Gilman Sargent and Nettie Adell Chamberlain, 27 Apr 1942; citing North Haverhill, Grafton, New Hampshire, Bureau of Vital Records and Health Statistics, Concord; FHL microfilm 2294250.
Name: Lemuel Gilman Sargent
Age: 59 Birth (Est): 1883
Father: Daniel Davison Sargent Mother: Helen Harrington
Marriage: 27 Apr 1942 Event Place: North Haverhill, Grafton, NH
Spouse: Nettie Adell Chamberlain
Age: 65 Birth (Est): 1877
Father: Henry Jackson Mother: Eliza Ann Berwick
Vermont, Vital Records, 1760-1954
Citing this Record: "Vermont, Vital Records, 1760-1954," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XFFH-S5H), Lemuel Sargent, 24 May 1882, Birth; citing State Capitol Building, Montpelier; FHL microfilm 540141.
Name: Lemuel Sargent
Birth: 24 May 1882 Eden, Lamoille, VT
Father: Daniel Sargent
Mother: Ellen Harrington
Vermont, Marriages, 1791-1974
Citing this Record: "Vermont, Marriages, 1791-1974," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/F8R6), Lemuel Sargent and Nancey Leach, 08 Sep 1902; citing Morristown, Vermont, reference alpha-S; FHL microfilm 540141.
Name: Lemuel Sargent
Birth Date: 1882 Birthplace: Eden Age: 20
Father: Daniel Sargent Mother: Hellen
Spouse: Nancey Leach
Marriage: 08 Sep 1902 Morristown, VT