The 1901 census (below) shows the Smith family living at 155 Park Road, Toxteth Park.
In the 1911 census (below) the family were living at 34 High Park Street. Harold H Smith was 15 years old and working as a telegraph messenger for the post office. His father was at this time an employer as a bricklayer, plasterer and builder.
On a sad note, the census shows that Harold's parents had already lost 4 of their 12 children.
The medal card for Harold H Smith (below) shows that he was a private in the Liverpool Regiment with the regimental number 241292. He was awarded the Victory Medal and the British War Medal. The card has not been completed for the theatre of war he first served in or the date, nor does it have any notes about his death.
UK, Soldiers Died in the Great War, 1914-1919
Click here to see the CWGC entry for Harold H Smith
This information shows that Harold was in the 6th Battalion of the King's Liverpool Regiment and died on 5th November 1918.