I think that I should state that I am a Stamp Collector.
Doing an internet search I came across your site and I noticed that one of the regiments that you are interested in is the 80th Foot, I also have an interest in this regiment, and hope that you may be able to help me.
I have some letters sent from Australia and India to the UK in 1842-1851, they are Soldiers letters, and were sent at the 1d concessional rate and had to be signed by the officer in charge, so I have the signatures of several officers.
I am finding it hard to find out any information about Privates Fredrick Kemp and J. Davis who are the writers of the letters.
Best regards David