Extracted marriage details for 1861 marriage gives John Chambers as age 23 (born c1838), father William Chambers.
https://www.familysearch.org/ark:/61903/1:1:FGXC-KM3LDS have the same marriage strangely listed as Clough, Ballymena & Clough, Downpatrick!
https://www.familysearch.org/ark:/61903/1:1:QGV8-LJBLThis John Chambers, son of William, is 16 in 1851 (born c1835)-
Dunbought Townland, Dunaghy County Antrim (1851)
William Chambers, Head, M, 40, Linen Weaver, Londonderry
Ann Chambers, Wife, M, 50, Winds Spools, Londonderry
John Chambers, Son, U, 16, Linen Weaver, County Antrim
Jane Irvin, W, 77, Winds Spools, Londonderry
Joseph Irvin, U, 12, Learning To Weave, Londonderry
http://www.searchforancestors.com/locality/ireland/census1851/dunaghy.htmlThe 1851 data is a fragment from the 1851 census which survives but the John Chambers that you are looking for could be in a place where records have been lost.
Extracted records for some children of John Chambers & Mary Easdale-
1. Mary (born 1871 Scotland)
https://www.familysearch.org/ark:/61903/1:1:FQSS-75F2. Margaretta (born 1871 Scotland)
https://www.familysearch.org/ark:/61903/1:1:FQ7Y-T9F3. Sarah (born 1874 Scotland)
https://www.familysearch.org/ark:/61903/1:1:FQHN-D994. Annie (married 1890 Illinois)
https://www.familysearch.org/ark:/61903/1:1:KFVY-QX9