KGS on Family Tree Circles

I'm researching the Daniel family of Dorset, Somerset and Devon in the UK.
Currently I'm looking for siblings William Haydon Daniel and Mary Elizabeth Daniel who were born c 1842 and 1846 in Chardstock Devon and Islington, London respectively.
There is a suggestion that they emigrated to Australia in about 1856 without their parents (John and Maria Daniel from Devon) who remained in London. A William Haydon Daniel was declared bankrupt in 1867 in Dundee, NSW.
Other sibings were John Isaac Pryer Daniel, Maria Jane Daniel and Rosa Daniel