Are you missing an Ann/e THELWELL at all?
There is a marriage & death in Victoria:
Marriage:
THELWELL Ann (born Rainhill, Lancashire) m. LAUCHLAN Mat Highet (born Ayr) 1894 #6446
Death:
LAUCHLAN Anne age 40yrs d. 1897 Malvern #9511
Father: William THELWELL
Mother: Theresa WATKINS
It appears she also had a brother named James.
Matthew Highet
LAUCHLAN's first marriage in 1867
http://www.rootschat.com/links/0seu/http://www.rootschat.com/links/0set/The Argus 19 Jul 1897
Deaths
LAUCHLAN On the 17th July, at her late residence ?Monomeeth, Waverley Road, East Malvern after a painful illness, my beloved wife Anne. M H Lauchlan
Burial at St Kilda Cemetery
LAUCHLAN Anne 40 years
Religion None Interred 18 Jul 1897
Location - Independent, Monumental, Comp B, Grave 94
MI
Ann
THELWELL died 17 Jul 1897
of Waverley Rd, East Malvern
Died 17 July 1897
Wife of Matthew Highet
LAUCHLAN.
3rd marriage for Matthew in 1899
http://www.rootschat.com/links/0sev/LAUCHLAN—HEATHERSHAW On the 11th February, at Hobart, Tasmania, by the Rev. C. H. Talbot, Matthew Highet Lauchlan, of Sydney,to Janet Lapsley, of Melbourne, daughter of the late Captain William Hamlet Williamson, of Port Glasgow, Scotland.
Sydney Morning Herald 12 Dec 1917
LAUCHLAN Dec 11, 1917 at the residence of his daughter Mrs W Lawrence Langton, Frazer-road, Lewisham, Matthew Highet LAUCHLAN, native of Ayre, Scotland, aged 84 years
An obituary SMY 16 Dec 1897
http://www.rootschat.com/links/0sex/http://www.bdm.nsw.gov.au/cgi-bin/Index/IndexingOrder.cgi/search?event=births15389/1917
LAUCHLAN Matthew H 84 years Petersham
Distric Petersham
Interred at Rookwood Cemetery - Independent Old Ground and Old Ground Extension
Section OG Row 5 Grave#2213
MI
Matthew Highet LAUCHLAN
Died 11 Jul 1917
Born Ayr, Scotland 5 Jan 1834.
Died SydneyCheers
Cando