As per NSW BDM
Mary LAWRENCE married George DAVIS in 1818 Vol 7, line 298.
Mary LAWRENCE married George DAVIES in 1818 … Vol 3a, line 2135
As per family search org
3 Feb 1818. George was 30., Mary was 28
https://familysearch.org/pal:/MM9.1.1/XTCK-FQ8 https://familysearch.org/pal:/MM9.1.1/XTCT-N9C (check the status for both)
https://familysearch.org/pal:/MM9.1.1/XTZV-HY9 from the Biographical Database of Australia (BDA)
http://www.bda-online.org.au/July 1814
Mary LAWRENCE, age 21, Servant, tried 4 Aug 1813 Dorset Assizes, 7 years, per Broxbornebury, arrived Sydney 28 July 1814. Ticket of Leave # 977, Certificate of Freedom # 461
Nov 1814 Muster
Mary LAWRENCE assigned to Mrs Reibey, at Sydney
Sept 1822 Muster
Mary
LYONS per Broxbornebury, wife of George Davis, at Sydney
Sept 1823 Muster
Mary DAVIES, Murrumbateman info as per Judith’s post. oops, I have missed a couple of lines.
Sept 1823 Muster
Mary DAVIS per Broxbornebury, Free by Servitude, wife of George Davis, at Bathurst
Nov 1828,
Mary DAVIES, murrumbateman in as per Judith's post.
So, perhaps she was Mary LYONS, then Mary LAWRENCE (transported under this name), then Mary DAVIS
Cheers, JM