Thank you Brett, took me along time in getting back to this family.
Since found out JOHN STOKES SALMON was born 21st June 1821 at Westmoreland, Cornwall, Jamaica, father was as you stated, his mother was Frances Charlotte (surname name recorded)and not founs a marriage.John Stockes Salmon's wife EMILY MARGARET SENIOR was born 16th May 1830 St Elizabeth, Cornwall, Jamacia her parents being Bernard Martin Senion Esq. of Salt Spring Estate, St Elizabeth, Jamaica her mother was Elizabeth.
Surcharging Births & Christening records for Jamaica, I discovered that John & Emily Salmon had 5 children, all Christened at St Elizabeth Jamaica: ELIZABETH FRANCES SALMON on 17th April 1849 (m) 1st June 1870 Richard Ramsden b. 4th Nov. 1841
JOHN BERNARD SALMON&EMILY CHARLOTTE SALMON were both Christened on 27th July 1851