This appears to be John’s birth entry
SENTANCE, JOHN  ISAAC     
mmn WALTON  GRO Reference: 1837  D Quarter in GRANTHAM UNION  Volume 14  Page 288
John & Mary name a son Walton
SENTANCE, WALTON       mmn HORTON  
GRO Reference: 1875  J Quarter in SOUTHWELL, NOTTS  Volume 07B  Page 351
No image to view on Anc*y this appears to be John’s baptism
John Isaac Sentance
Birth 17 Sep 1837
Baptism 15 Oct 1837 Barrowby,Lincoln 
Father    Valentine Sentance Mother   Frances
1851 census John is listed as Isaac parents Valentine & Frances 
https://www.familysearch.org/ark:/61903/1:1:SGN2-6TW1841 census Val’e transcribed as Dale
Piece   615
Page number   19
Dale Sentance 29 Shepherd
Frances Sentance 26
Walton Sentance 5
JOHN Sentance   3
Sarah Sentance 2
William Sentance 11 Mo
Valentine Sentance
Marriage 16 May 1835 Barrowby,Lincoln
Spouse   Frances Walton
For info. Burials
https://www.findagrave.com/memorial/194669704/valentine-sentancehttps://www.findagrave.com/memorial/194669748/frances_sentanceMary Horton
Baptism 27 Oct 1839 Norwell and Carlton On Trent Nottingham
Father    Henry Horton Mother   Elizabeth
HORTON, MARY   mmn RICKETT  
GRO Reference: 1839  S Quarter in SOUTHWELL  Volume 15  Page 617
1841c Piece   866 Page number   25
Henry Horton 20
Elizabeth Horton 20
Mary Horton   1
Marriage
1838 Dec Southwell Nottinghamshire Volume 15 Page   1189
Henry Horton
Female name on same page
Elizabeth Rickett
Mary’s sister Sarah married 1868 Spouse William Henton - image on Anc*y 
one witness named Mary Sentance