Can you let us know which time period please?
The 48th were called such for a very long period - from 1748 through to 1881 (and even clung to the name through the 1st and 2nd World Wars). The 48th were at Quebec in 1759, at the Great Siege of Gibraltar (the source of the castle on their cap badge) from 1779-1783, gained the battle honour of Talavera against Napoleon in the Peninsular War in 1809, were stationed in Australia in the early 1800s, before returning to take part in the Crimean War from 1856 to 1857 where they took part in the Battle of Sevastopol.
If you let us know a name then we might be able to locate some information, though I have very little directly to hand on the earlier records.
Steve.