See pp 204-205 of The Law Relating to Officers in the Army (1855) by Harris Prendergast:
The dastardly deed:
The Mirror of parliament, ed. by J.H. Barrow. 8th parl., 2nd session-12th parl., 3rd session. 13th parl., 1st session-14th parl., 1st session. Published 1838. p 256ff:
I note that neither Clune nor Blake are present in the 1815 lists.
Clune died some time before 1820:
“Married  ... H. M, Radford, MD to Eliza, widow of the late Capt. Clune, 55th regt, of foot” New monthly magazine 1820 (part 2) - Page 476.