Chailey Parish Magazine notes in October 1914 that Arthur Gibbs is serving his King and Country.  In October 1915 it reports Gibbs, Lance-Corporal A, RAMC and this information is then repeated monthly up to and including the final published roll call in July 1919.

There are no obvious Chailey related matches for this man, the closest being a Wallace Arthur Gibbs whose birth was registered at Lewes in 1872. 

The National Archives yields two possibilities: 19485 Private (later Temporary Staff Sergeant) Arthur Gibbs of the 12th General Hospital, RAMC and 54609 Private Arthur Gibbs.  Of the two, I think the second man is probably the more likely candidate.

Sources and Acknowledgements

• Chailey Parish Magazine
• England and Wales, Civil Registration Index: 1837-1983
• The National Archives: Medal Index Cards