Further to the Capel surname, some elimination:
I gave this birth in a previous answer
I see a birth (and death 2 weeks later
)registered in Adelaide,
John Capel
Birth, 22 Jul. 1852 at Adelaide
Registered: Adelaide, South Australia, Australia, Vol4 p47
Parents: John Capel, Lucy KilbornEngland Census 30 March 1851
Lucy Burrows 35 widow, and J Capel, 37 living at 19 Allen St, Lambeth
This is their marriage:
Dec 21, 1851, St Judes church, Southwark
John Caple (sic), bachelor, Lucy Burrows widow, both of full age both living at an address in Southwark, his occupation coachbuilder. Lucy's father's surname is Kilborn, thus one assumes her maiden name was Kilborn. Occupations of both parents: wheelwright.
Thus this cannot be the "Capel" arriving Adelaide. The only Trove mention I can see in the 1850s for surname Capel or Caple is for an assault on a John Capel, wheelwright.
This John and Lucy Caple/Capel are buried at West Terrace Cemetery, Adelaide
Judith