Marka uu dib ugu soo laabto adeegga bishii Maarso 1907 Mulock wuxuu ku biiray koorsada torpedo ee HMS "Vernon". Wax yar ka hor Scott wuxuu Mulock ku casuumay inuu ku biiro socdaalkiisii labaad ee barafka; taliyihii dhallinyarada ahaa wuxuu aqbalay shaki la'aan. Kadib Ernest Shackleton wuxuu u qoray warqad uu kaga codsanayo in uu ka qeyb qaato safarkii Nimrod
Waxaad Sababtoo ah heshiiskii ninkaasi la galay Scott, Mulock wuu diiday, laakiin si aan ula kac ahayn ayuu u bilaabay tartan isagoo u sheegay Shackleton in Scott uu qorsheynayo inuu "soo laabto koonfurta mar kale"; layaab malahan in bishii Abriil 1908 Mulock uu ku guuldareystay inuu u qalmo sida taliye torpedo. Commodore J. Briggs, RN, oo amar ku bixiyay "Vernon", ayaa ku duubay diiwaanka adeegga rasmiga ah ee Mulock in "guuldarradiisa ku aaddan u qalmidda tuubada ay sabab u ahayd feejignaan la'aantiisa", oo ah canaanta cad ee dadaalka Scott iyo Shackleton. Sanadkii 1908 Mulock waxaa loo magacaabay (Captain Henry Oliver, RN) si loogu diyaariyo amarkiisa.