CENSUS: 1880
John Blackston 40
Mary A. Blackston 35
William Blackston 19
John Blackston 15 (This is John Squires)
George E. Blackston 11 (This is George Squires)
Samuel Blackston 6
Kate Blackston 3
Ella Blackston 9m
1880; Census Place: Church Hill, Queen Annes, Maryland; Roll: 514; Family History Film: 1254514; Page: 328C; Enumeration District: 058; Image: 0277.

Kent Co Marriage Book says married May 14, 1889 which would be well after the kids were born. He did not divorce until 1883.

MARRIAGE: John W. Blackiston m. Mary A. Squires May 14, 1889 Rev. Mr. Smith. Kent Co. MD

CENSUS: 1900
John Blackston 61 born Mar 1839 MD parents born MD
Mary A Blackston 55 born Nov 1844 m 24y 7 ch 6 lvg born DE, parents DE
John Blackston 16 born Nov 1883 born MD son
1900; Census Place: Crumpton, Queen Anne, Maryland; Roll: 626; Page: 12B; Enumeration District: 68; FHL microfilm: 1240626.

CENSUS: 1910
John W Blackiston 70 born MD parents born MD married 30y
Martha A Blackiston 65 born DE parents born DE 7 children 6 living (Mary)
next door is
W John Blackiston 27
Annie Blackiston 24
James Blackiston 3
Clarence Blackiston 2
Florence A Blackiston 1
1910; Census Place: Crumpton, Queen Anne's, Maryland; Roll: T624_567; Page: 12A; Enumeration District: 0073; FHL microfilm: 1374580

John W Blackiston 79 born MD parents born MD
Mary Ann Blackiston 65 born DE parents born DE
1920;Census Place: District 7, Queen Anne's, Maryland; Roll: T625_675; Page: 12B; Enumeration District: 83; Image: 985.

John Blackiston 36 born MD
Annie Blackiston 30
Jennings Blackiston 14
Clarence Blackiston 13
Florence Blackiston 10
J Lester Blackiston 7
1920; Census Place: District 7, Queen Anne's, Maryland; Roll: T625_675; Page: 15A; Enumeration District: 83

Samuel Thomas Blackiston born May 12 1873 born Queen Annes Co son of John W. Blackiston and Mary A Squares per SSA record.

PENSION: CW served in C 2 MD Inf. widow applied Jan 26 1925.
John Squires 65 Head
Bertha Squires 45 Wife
John E Squires 26 Son
William T Squires 25 Son
Robert M Squires 20 Son
Lillian Squires 17 Daughter
Blanche S Squires 11 Daughter
Mary A Blackiston 101 Mother
1930; Census Place: Crumpton, Queen Annes, Maryland; Page: 10A; Enumeration District: 0014; FHL microfilm: 2340613