According to records at GeanologySA, Maria arrived aboard the Samuel Boddington, however, we don't know when.
According to https://passengers.history.sa.gov.au/node/935435
the SAMUEL BODDINGTON made multiple journeys.
===27 May 1851 ➜ 7 September 1851===
SAMUEL BODDINGTON
Plymouth / London
===5 December 1849 ➜ 25 March 1850===
SAMUEL BODDINGTON
Gravesend / London
I believe the below can be excluded as I can't find any Weeks on the passenger list
from here: https://archives.sa.gov.au/finding-information/discover-our-collect...
===26 September 1848 ➜ 11 January 1849===
SAMUEL BODDINGTON
London
N.B. Maria would have been 17/18yoa at departure
It is worth noting, however:
There is a Maria Wilson (24yoa) travelling solo
There is also a Maria (Unknown) (15yoa) - If I am reading the list correctly.