Dhameystir weedha soo socota: Wuxuu wax ku bartay Royal Military Academy, Woolwich waxaana loo magacaabay Royal Artillery sanadkii 1875. Wuxuu ka soo shaqeeyay Dagaalkii Labaad ee Ingiriiska iyo Afgaanistaan laga soo bilaabo 1878 ilaa 1880, iyo
Dagaalkii Ingiriiska iyo Masar ee 1884. Waxaa loo dalacsiiyay major sanadkii 1892. Thomas waxaa loo dalacsiiyay Kornayl 1899 wuxuuna ku dagaalamay Dagaalkii Labaad ee Anglo-Boer intii u dhaxeysay 1899 iyo 1901, intii uu socday waxaa laba jeer lagu xusay waraaqaha. Sanadkii 1901 waxaa loo magacaabay Companion of the Distinguished Service Order, iyo Companion of the Order of the Bath sanadkii 1904. Intii u dhaxeysay 1909 iyo 1911 wuxuu ahaa brigadier-general-ka qeybta 3-aad ee Artillery, ka hor inta uusan u adeegin brigadier-general-ka qeybta 24-aad ee Artillery intii u dhaxeysay 1914 iyo 1915.