John Cornell Chads
Lieutenant-colonel John Cornell Chads ( 9 August 1793 – 28 February 1854 ) joined the Royal Marines and reached the rank of 2nd Lieutenant on 4 May 1809 , aged 16 . 
<triplet> John Cornell Chads <subj> 9 August 1793 <obj> date of birth <subj> 28 February 1854 <obj> date of death