Cornelius Barker
Cornelius was born in April 1816 and his baptism took place on May 19th, 1816 in Castle Camps, Cambridgeshire, England conducted by Wilfrid Clark.^1 2 

• Birth Notes

  https://www.familysearch.org/ark:/61903/3:1:3QS7-9968-NPK4?i=37&cat=780255
  
  https://www.cfhs.org.uk/resultsd.cfm?tag=4&dbase=Baptism&surname=&forename=&gsearch=&forindex=29200
  Age 1m at baptism

He died at the age of 83 in 1899.

• Death Notes

  perhaps?
  Death
  17 May 1899
  Saffron Walden, Essex, England

 Mary Baily
Mary was born in 1816 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  1871 census shows age 55 and birth place Castle Camps
  
  1841 census shows age 23 (and 2 yrs younger than her husband).

Mary is no longer alive.

 Robert Barker
Robert was born in 1839 and his baptism took place on February 24th, 1839 in Camps Green, Parish of Castle Camps, Cambridgeshire, England conducted by Reverend Richard Hollings.^4 2 

• Birth Notes

  1841 census shows: Cornelius 25; Mary 23; Robert 2; Charles 1;
  
  https://www.familysearch.org/ark:/61903/3:1:3QSQ-G968-NR3J

He died at the age of 3 in June 1842.  He was buried on June 7th, 1842 in Helions Bumpstead, Essex, England.² 

• Death Notes

  https://www.familysearch.org/ark:/61903/3:1:3QS7-L968-NR95

 Charles Barker
Charles was born in 1840 and his baptism took place on June 7th, 1840 in Camps Green, Parish of Castle Camps, Cambridgeshire, England conducted by Reverend W. Collison.^4 2 

• Birth Notes

  1841 census shows: Cornelius 25; Mary 23; Robert 2; Charles 1;
  
  https://www.familysearch.org/ark:/61903/3:1:3QS7-L968-NR39

 Robert Barker
Robert was born in 1842 and his baptism took place on November 6th, 1842 in Helions Bumpstead, Essex, England conducted by Reverend Joshua Scholefield.² 

• Birth Notes

  https://www.familysearch.org/ark:/61903/3:1:3QS7-8968-NRS8

 Henry Barker
Henry was born in 1845 in Helions Bumpstead, Essex, England and his baptism took place on June 8th, 1845 in Castle Camps, Cambridgeshire, England conducted by George Pearson - Rector.² 

• Birth Notes

  https://www.familysearch.org/ark:/61903/3:1:3QSQ-G968-N51S?i=308&cat=780255

 John Barker
John was born in 1848 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  age 23 on 1871 census night.
  https://www.familysearch.org/ark:/61903/1:1:VFFD-ZNC

 James Barker
James was born in 1855 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  https://www.familysearch.org/ark:/61903/1:1:VFFD-ZNZ

 Walter Barker
Walter was born in 1856 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  https://www.familysearch.org/ark:/61903/1:1:VFFD-ZN8

 Ellen Barker
Ellen was born in 1859 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  https://www.familysearch.org/ark:/61903/1:1:VFFD-ZND

 Alfred Barker
Alfred was born in 1861 in Castle Camps, Cambridgeshire, England.³ 

• Birth Notes

  https://www.familysearch.org/ark:/61903/1:1:VFFD-ZN6