I have a database of all the BMD's for DENHAM from 1837 to 1911 with deaths extended to 1945.
I have 6 Hempson's list which are as follows,
Kemball Hempson Denham born 1839 Plomesgate V12 Pg353
Alexander Hempson D Denham born 1872 Wandsworth V1d Pg635
William Hempson Denham married 1838 Ipswich V12 Pg455
Amelia Clayton Hempson Denham married 1846 Woodbridge v12 Pg631
William Hempson Denham died 1891 Aged 83 Fulham V1a Pg 174
Kendal Hempson Denham died 1903 Aged 64 Godstone V2a Pg117
I hope this helps although you may already have the info.