Buuxi weedha soo socota: Fox wuxuu ku dhashay Derby ee Derbyshire 1843, mid ka mid ah lix carruur ah oo ay dhaleen Marianne "née" Strutt (1814<unk>1898) iyo Douglas Fox (1798<unk>1885), maxkamad iyo dhakhtar. Wuxuu wax ku bartay Rossall School iyo Brighton College ka hor inta uusan ku biirin ciidanka. Fox wuxuu bilaabay xirfadiisa militariga isaga oo u adeegaya 100aad (Boqorka Wales ee Royal Canadian) Regiment of Foot laga bilaabo 1863-1875, isagoo loo dalacsiiyay Lieutenant 1865 iyo Captain 1871. Ciidankiisa wuxuu ka howlgalay Malta. Ka dib markii loo wareejiyay 42-aad (Royal Highland) Regiment of Foot (the 'Black Watch') wuxuu la joogay guurtidiisa Aldershot 1881 ka hor inta uusan u adeegin ciidanka
Ololaha Masar halkaas oo uu ku dhaawacmay intii lagu jiray Dagaalkii Tell El Kebir ee 1882. Sawirka Alphonse-Marie-Adolphe de Neuville ee "The Storming of Tel el Kebir" (1882) Fox waxaa lagu sawiray bidix isagoo dhaawacmay oo garabka ku jira oo uu haysto askari kale, halka xaqiiqadu tahay in isaga lagu toogtay bowdada.