ANCESTRY RESEARCH:

Name: Benjamin R. Cannefax
Spouse: Manerva Ann Murphy
Marriage Date: 2 Apr 1860
Location: Greene
State: Missouri

Name: B R Cannefax
Marriage Date: 26 Jul 1883
Marriage Place: Greene, Missouri, USA
Spouse: Allen Murphy

Wonder if he married three times:
Name: B R Camper
[B R Cannefax] My note when view it is Cannefax, not Camper
Marriage Date: 6 May 1869
Marriage Place: Greene, Missouri, USA
Spouse: Jennie Newbill

Year: 1870; Census Place: Campbell, Greene, Missouri; Roll: M593_777; Page: 60B; Family History Library Film: 552276.
Benjam Cannefax 30
Virginia Cannefax 23
Here is a census and marriage, that makes me wonder if Allen Murphy really had all those given names, and is perhaps mixed up with Jennie Newbill.

Year: 1880; Census Place: Brookline, Greene, Missouri; Roll: 687; Page: 126B; Enumeration District: 038
B. R. Canefax 41
Virginia J. Canefax wife 33
Ader V. Canefax daughter 8
Bertie Canefax daughter 4
Claude Canefax son 2

Social Security Apps and Claims:
Name: Virginia J Newbill Gender: Female
Spouse: Benjamin R Cannefax
Child: Charles Ernest Cannefax
Name: Charles Ernest Cannefax
Gender: Male Race: White
Birth Date: 1 Feb 1878
Birth Place: Springfield, Missouri
Father: Benjamin R Cannefax
Mother: Virginia J Newbill
SSN: 552094882
Notes: Dec 1936: Name listed as CHARLES ERNEST CANNEFAX

Springfield, US Directory 1890
Cannefax Benjamin R. r 858 S Evans
He is the only one listed as would be considered white. Three others James on Forest Ave., John Cannefax listed as black on St. Louis St. and a second John black on Grand Ave.

His middle name may be Redford Cannefax the 1840 census, Greene County, MO. Redford: Also note when searching this one he may come up as Geoge Redford or Radford Cannefax.
Name: Redford Cannefax
[Radford Cannefax]
Home in 1840 (City, County, State): Greene, Missouri
Free White Persons - Males - Under 5: 1
Free White Persons - Males - 20 thru 29: 1
Free White Persons - Males - 60 thru 69: 1
Free White Persons - Females - 20 thru 29: 1
Free White Persons - Females - 60 thru 69: 1
Slaves - Males - Under 10: 3
Slaves - Males - 10 thru 23: 4
Slaves - Males - 36 thru 54: 1
Slaves - Males - 55 thru 99: 1
Slaves - Females - Under 10: 1
Slaves - Females - 10 thru 23: 1
Slaves - Females - 55 thru 99: 1
Persons Employed in Agriculture: 5
Free White Persons - Under 20: 1
Free White Persons - 20 thru 49: 2
Total Free White Persons: 5
Total Slaves: 12
Total All Persons - Free White, Free Colored, Slaves: 17

This most likely him with parents:
Year: 1850; Census Place: Campbell, Greene, Missouri; Roll: 400; Page: 254A.
Benjn W Cannefax 43
Nancy J Cannefax 33
Mary A Cannefax 14
Benj R Cannefax 11
William M Cannefax 9
M J Cannefax 7
Thomas B Cannefax 2
Francis A Cannefax 0

Not so sure of this as it shows enlisted in Arkansas, but it is possible.
Name: Benjamin R Cannefax Age: 24
Birth Date: abt 1838
Enlistment Date: 27 Jul 1862
Enlistment Place: Carroll Co, Arkansas, USA
Rank: Private Military Unit: Third Cavalry, A-C