From what I can tell Robert Green is still alive in 1900 as a widow living next door to Henry Williams [FATHER OF MARY WILLIAMS] 1900 United States Federal Census
Name: Robert M Green Home in 1900: Justice Precinct 5, Navarro, Texas Age: 25 Birth Date: Jun 1874 Birthplace: Texas Race: White Ethnicity: American Gender: Male Relationship to head-of-house: Brother Father's Birthplace: Georgia Mother's Birthplace: Arkansas Marital Status: Widowed Residence : Frost Town, Navarro, Texas Issac A Green 34 Nancy M Green 20 Walter A Green 10 Joy V Green 4 Benjamin P Green 3 May B Green 2 Robert M Green 25
next door the name is really HENRY AND HE FITS ALL THE INFO IN THE LINK YOU POSTED Name: Hugh T Williams [Henry Williams] Home in 1900: Justice Precinct 5, Navarro, Texas Age: 68 Birth Date: Mar 1832 Birthplace: Georgia Race: White Ethnicity: American Gender: Male Relationship to head-of-house: Head Father's Birthplace: Mississippi Mother's Birthplace: Georgia Spouse's Name: Martha Marriage Year: 1865 Marital Status: Married Years Married: 35 Residence : Frost Town, Navarro, Texas Hugh T Williams 68 Martha Williams 58
HENRY AND MARTHA ARE STILL ALIVE IN 1910 Name: Henry T Williams Age in 1910: 78 Estimated Birth Year: abt 1832 Birthplace: Georgia Relation to Head of House: Father Father's Birth Place: Georgia Mother's Birth Place: Georgia Spouse's Name: Martha Home in 1910: Justice Precinct 5, Navarro, Texas Marital Status: Married Race: White Gender: Male Neighbors: View others on page Household Members: Name Age Sam J Williams 39 Della Williams 30 Stella Williams 16 Judson Williams 13 Harvey Williams 11 Edwin Williams 6/12 Henry T Williams 78 Martha Williams 68
just for reference Name: Mary Williams Home in 1880: Navarro, Texas Age: 2 Estimated Birth Year: abt 1878 Birthplace: Texas Relation to Head of Household: Daughter Father's Name: H. T. Father's birthplace: Georgia Mother's Name: M. A. Mother's birthplace: Mississippi Neighbors: View others on page Marital Status: Single Race: White Gender: Female Household Members: Name Age H. T. Williams 48head M. A. Williams 38wife Mollie Williams 13 dau Sam Williams 11 son Joe Williams 9son Mary Williams 2 dau Marten Linsey 21 stepson Source Citation: Year: 1880; Census Place:, Navarro, Texas; Roll: T9_1321; Family History Film: 1255321; Page: 433.1000; Enumeration District: 135; . ***
***to show proximity to WILLIAMS FAMILY
Name: Robt. Green Home in 1880: Navarro, Texas Age: 6 Estimated Birth Year: abt 1874 Birthplace: Texas Relation to Head of Household: Son Father's Name: B. G. Father's birthplace: Georgia Mother's Name: Manda Mother's birthplace: Georgia Neighbors: View others on page Marital Status: Single Race: White Gender: Male Household Members: Name Age B. G. Green 34 Manda Green 26 Ida Green 10 Robt. Green 6 E. Green 4 Dan Green 2 Manda Green 5M Jack Morgan 10 Houston Morgan 8 Source Citation: Year: 1880; Census Place:, Navarro, Texas; Roll: T9_1321; Family History Film: 1255321; Page: 432.4000; Enumeration District: 135; .
THIS APPEARS TO BE THE SAME ROBERT GREEN************ Name: Robert Green Death date: 25 Oct 1938 Death place: Houston, Harris, Texas Gender: Male Race or color (on document): W Age at death: 64 years 4 months 20 days Estimated birth year: Birth date: 05 Jun 1874 Birth place: Frost, Texas ************** Marital status: Widowed Spouse name: Drew Father name: Unknown Father birth place: Unknown Mother name: Unknown Mother birth place: Unknown Occupation: Residence: Houston, Texas Cemetery name: Hollywood Cemetery Burial place: Burial date: 26 Oct 1938 Additional relatives: Film number: 2117824 Digital GS number: 4030411 Image number: 1199 Reference number: DTH Rec cn 46114 Collection: Texas Deaths, 1890-1976
EVERYTHING IN THE LINK [BUT A MARRIAGE] CHECKS OUT EXCEPT WE KNOW YOUR MARY WAS STILL ALIVE IN 1900 PERHAPS SHE AND ROBERT AND THE WILLIAMS FAMILY HAD "PARTING OF THE WAYS"
AND THIS ROBERT DOESNT DIE UNTIL 1938 [SAME YEAR AS MARY ...INTERESTING]...YOU WOULD THINK IF SHE HAD BEEN MARRIED BEFORE SOME MENTION MIGHT HAVE BEEN MADE OF IT...BUT PERHAPS NOT...I KNOW THAT SOME PEOPLE PREFERRED TO BE "WIDOWED" THAN TO BE LISTED AS DIVORCED...
I DONT KNOW ....IT WOULD BE NICE IF THIS WAS HER BUT IT JUST DOESNT ADD UP BASED ON FAMILY LORE...AS TO A "TRAVELING REV WILLIAMS"