My aunt has a 30cM connection with a descendant of this couple (and eight other matches with them, from two separate family groups.
From what I can gather, Charles married Rose in Australia in 1853.
This is possibly Charles with his parents in Wickham, Hants in 1841:
Thomas Boyce Male 56 1785 Hampshire, a cooper
Jane Boyce Female 45 1796 Hampshire,
Caroline Boyce Female 15 1826 Hampshire
Mary Boyce Female 14 1827 Hampshire,
Harriett Boyce Female 12 1829 Hampshire,
Thomas Boyce Male 10 1831 Hampshire,
Charles Boyce Male 8 1833 Hampshire,
George Boyce Male 5 1836 Hampshire,
https://www.ancestry.co.uk/interacti...162.1531920438
If it is (Ancestry have transcribed it as Boyd) it looks as if the whole family may have emigrated. Can anyone find them?