May I chime in here? This family has me baffled and reading the last reply hasn't helped! Martha remarried eh!!! Here's some more confusing stuff.
Thomas Noakes Floate and family including wife Martha arrived South Australia 1839. Also on board was Henry and wife Harriet (Smith?) with son William aged 9mnths. Harriet apparently lived beyond marriage of Henry and Catherine Corregan in 1857 but no divorce record?
Birth registration of James Float, son of Henry and Catherine shows an elder sibling called Noakes.
Are Henry Floate, spouse of Harriet and son of Thomas Noakes and Henry Floate spouse of Catherine and father of James one and the same person?
Death registration Henry Floate 1816-1898 has his father as Henry and spouse Catherine Corregan. Henry also only in Australia for 46 years