Kammala wannan jumla: Da yake zama likitan sojoji, Nicholson ya shafe wasu shekaru a Afirka ta Kudu, kuma ya ga aiki a cikin
Yaƙe-yaƙe na Xhosa a cikin 1853 da 1854. Ya kasance a China a lokacin Yaƙin Opium na Biyu, kuma yana nan a lokacin da aka kwashe fadar bazara a Beijing; kuma a New Zealand ya shiga cikin Yaƙin Taranaki na Biyu.