In November 1841, he left Kokand for Bukhara in an ill-fated attempt to rescue fellow officer Colonel Charles Stoddart, and both were executed on 24 June 1842 by the order of Emir Nasrullah Khan of Bukhara.
I november 1841 forlod han Kokand for at rejse til Bukhara i et fortvivlet forsøg på at redde kollegaen Charles Stoddart, og begge blev henrettet den 24. juni 1842 efter ordre fra emir Nasrullah Khan af Bukhara.