Thank you so much for the Times references. We are fortunate to be able to access the Digital Archive from home courtesy of the WA State Library's subscription. Had I the wit to think of this in the first place, I could have saved you the time you generously spent on my query!
We also have digital download facilities from home (also courtesy of the State Library) from the National Archives. I was therefore able to acquire Finnerty's pages of Army Record as an extract from the 47th Regiment's documents. He certainly had rapid promotion from the ranks: Private (1833), Corporal (1837), Sergeant (1837),Sergeant-Major (1850), Ensign (1850),Lietuenant (1854), Captain (1857). I think his promotions without purchase may have been a draw-back to his later career - thanks to the colonial snobbery of his times.
When I saw on his record 'Turkey' instead of 'Crimea', I too checked the PDF medal roll for the 47th (not trusting ancestry's transcriptions!). I am quite excited that he served at Scutari Barrack Hospital - it makes for a change of pace.
Thanks again for your trouble -- has reminded me of what resources we are fortunate to have available and the fact that I should take more advantage of them.