Perhaps this information may help - the Cemetery Trust would only have burial records from the date the Trust was formed.
Transcribed from Victorian Government Gazette #78, Date Friday July 31st 1863
LANCEFIELD - Site in the parish of Lancefield, for a Cemetery, temporarily reserved by Order of 27th July, 1863. Six acres, county of Bourke, parish of Lancefield: Commencing at the north-east angle at a post bearing east eighteen chains, more or less, from the north-west angle of the Melbourne Hill reserve; bounded on the north by a road bearing west, six chains; on the west by a line bearing south ten chains; on the south by a line bearing east six chains; and on the east by a line bearing north ten chains to the point of commencement (63.G.4870) Gazetted (1°) on 31 July, 1863.
Trustees appointed 24 August 1863 and Gazetted Friday September 4th, 1863
John HALEY, William DOWDEN, Thomas FIELD, J.P.CONWAY, Thomas WOOD, R.S.GRAHAM and William HARRIMAN Senior.
Where were Elizabeth's brothers and their families buried?
Cheers
Cando