There seem to be 2 Rebecca Clucas in Patrick
In 1861 census both are listed as age 6
30 JUL 1854 Patrick d/o John Clucas and Ellinor Cottier md 04 APR 1838 Patrick
Christening: 28 JAN 1855 Patrick d/o William Clucas and Catherine Quine md 23 Apr 1840 Patrick
Per IGI Rebecca Clucas md Joseph Beaumont 20 Nov 1879 Patrick.
Must be the other one