Thanks once again, I had noticed that the article was for 2 years after William's widow remarried - so presumably was for someone else with the same surname.
I have held on to the information and notice that 2 W Kirklands died in NSW in 1844 (one in Sydney and the other in Albury) - so presumably one of them would be William as his widow's second marriage on IGI is in mid 1844 in Sydney. She married James Laurie on 6 Aug 1844 in Sydney according to IGI and the Ancestry record shows the location as Liverpool Plains, Tamworth, NSW. Her daughter Jane Anne Kirkland married in Scotland in 1864 and died in 1877. So far, I haven't been able to find any details of her return to the UK.
The 80th Foot was all over the world but in the 1840s was engaged in convict transportation to Australia, according to various historical sites. Details as below.
1835 Liverpool. Dets.
1835-36 Chatham
1836-37 Sydney, N.S.W. Convict escort duty to Australia
1837-41 Windsor, N.S.W. Dets. including Norfolk Island
1840-44 Det. in New Zealand
1841-45 Parramatta, N.S.W. Dets.
1845 Agra
Once again, thanks for all your help and I hope this information helps someone else
Cheers
Anna
