immediate thought is national archives , but without a regiment/ regimental number ....they have miles & miles & miles of shelves I,m told.
Anyway one positive thing, you have him in Connaught Hospital. in 1901.Does the hospital still exist? if so maybe contacting them..
Someone on the Armed Forces Board may be able to help.
Other thanthat if you drop into the chat room sometime a lot of knowledgeable folkt there too.
Or alternatively on the approriate county board ( a few farnboroughs)....he must be traceable surely (famous last words).Someone local might be able to tell you if its still there/changed name....where records are..
tracing his death would involve trawling through BDMs .......
hope those ideas bear fruit
jed