Actually Finnerty is not an ancestor - my family history comprises a long line of agricultural labourers and for light relief (and of greater interest) convicts and criminals from Bedfordshire.
After visiting the battlefields of the Crimean War, I became entranced with the whole topic. My hobby is identifying all the veterans of the Crimean War who settled in Western Australia. Thus far I have found 230 men who came here as convicts, the enrolled pensioner force who guarded them, policemen, prison warders (these mainly from the Turkish Contingent)and some free settlers. I know I have only scraped the surface - but they are not easily found. Our National Library's online digitised newspaper archives "Trove" has been a great help. Like the "Times" for you, it is indispensible. We had three veterans of the Charge of Light Brigade settle here.
As for Finnerty, I have discovered two others - James and Michael - born in the same parish as Charles. I suspect they are brothers or cousins as it was a small parish. James and Michael joined the Royal New Zealand Fencibles in 1847/48. I am writing a joint article about Charles Finnery - I have the first half devoted to Army career and family; my friend has the second half which is about his career in Western Australia as Staff Officer of the EPF.
Thanks again for your interest. Tom Muir's CD sounds interesting. I will be following the threads.