Hi Debra,
No luck with Lewis, but I did find the following info, in case you don't have access to these CDs:
Death: Timothy Foley, son of Timothy Foley and Elizabeth Aheran, died 1859, aged 24, born Cork, death registered Victoria 1859/244.
[LDS Australian Vital Records Index]
Death: Timothy Foley, aged 41, died 1873, parents Louis and Ann Foley, born "Lime" (Limerick?), death registered Victoria 1873/3205.
[LDS Australian Vital Records Index]
Death: Ann Foley, daur of Timothy Foley and Elizabeth Ahern, died 1855, aged 24, born Cork, death registered Victoria 1855/2450.
[LDS Australian Vital Records Index]
Marriage: Mary Foley, aged 27, married Bartholomew Cashman, aged 38, 18 Jan 1854 in Tasmania, 1854/998.
[LDS Australian Vital Records Index] The Tasmanian Pioneer Index says they were married in Launceston 998/1854 RGD37.
Denis Foley, aged 35, died 4 Oct 1853 at Tasmania, 1853/133.
[LDS Australian Vital Records Index] The Tasmanian Pioneer Index says he died Westbury 133/1853 RGD35.
There appear to have been three or four couples in Tasmania with families with the last name Foley. The names Timothy and Denis appear mostly in Victoria Foleys however (just a quick observation of mine, not scientific fact, so you will have to check yourself).
Hope something there helps. Good luck with your research.
Monica