PASCAL/PASCALL Births Guernsey AND Jersey

[Barnsie]

Trying to find Births of children found in 1861 UK Census - St. Peter Port Guernsey.
The children are listed with Mother whose christian name is FROSEN?...wife of VICTOR DESPLANQUE, Stone Dresser.  He is born abt. 1835 France, she is born abt. 1834 Guernsey.
As first child listed is stated as step son, I am presuming Frosen was Mother of children.

I can't find a Marriage for this couple, nor Births for these children:

ARNNES? PASCAL (male)  born abt. 1854 Guernsey
FROSEN PASCAL (female) born abt. 1855 Guernsey
EDWARD PASCAL born abt. 1856 JERSEY
ROSE PASCAL born abt. 1857 Guernsey

On a Marriage Cert. EDWARD PASCAL states Father called PETER PASCAL, Farmer.
By 1871 Census Victor is stated as unmarried and in St. Heliers.  No sign of family.

Any help finding these Births would be wonderful.

Thank You.