Genealogy Forum UK

I found a record at FMP under the 1861 Army Index:

First Name(s) Saml
Last Name Gowler
Number 3911
Rank Private
Unit: 1st Btn 1st Foot (Royal)
Regiment Stationed at: Trimulgherry East Indies

National Archives reference: WO12 / 1931

Any clues in what Unit this might actually be?
Seems a bit generic!

Thanks
Andrew

the first foot of line regiments is the royal scots

the first foot guards is the grenadier guards