Hi
Tracking back James Gurley Baskervill's son (who married in 1863 also called James Gurley Baskervill) though censuses gives you his father age 52 on the 1861 census a brass foundry finisher born Shoreditch.
This seems a likely baptism for him mistranscribed on the IGI
JAMES QUELEY BASKERVILLE 
Birth:  23 JUN 1808    
Christening:  31 JUL 1808   Saint Giles Cripplegate, London
Father:  WM BASKERVILLE   
Mother:  AMY     
and his parents marriage
WILLIAM BASKERVILLE 
AMEY MILLETT  
Marriage:  18 OCT 1796   Saint Leonards, Shoreditch, London 
Regards
Valda