Soldier in Dover 1903 to 1904

[GRO10a852]

Can someone advise how I find out about a particular soldier who was in Dover in 1903 to 1904 His name was William Audley.

I know very little about him other than he had a daughter Gladys Winifred Audley.

Gladys Winifred Audley: her birth was registered in Q1 1904 in Dover her mothers maiden name is recorded as French.
She was baptised at St Bartholomew's Church Dover on the 7th February 1904 and her parents were recorded as William Audley, a soldier & Emily Elizabeth Audley (although I doubt that they were married)

The mother of Gladys Winifred Audley married as Emily Elizabeth French in Q4 1907 to Leonard William Sage. in Watford

In the 1911 census Gladys Winifred Audley was living in Hertfordshire described as step daughter with Leonard W Sage and Emily E Sage.

Can someone please advise how I find our something about Gladys Winifred Audley's father William Audley who was a soldier.

Thanks in anticipation of your help