Dee ihe ọzọ banyere paragraf a - A mụrụ Williamson n'ihe dị ka afọ 1775. Ọ banyere na Royal Military Academy na Woolwich na 8 Ọgọstụ 1791, wee nata ọrụ dịka onye isi nke abụọ na Royal Artillery na 1 Jenụwarị 1794. E buliri ya n'ọkwa lieutenant, na 11 Machị 1794. Na June 1795, o jere ozi n'ụsọ oké osimiri France, na njem ahụ gaa Quiberon Bay iji nyere ndị eze France aka. N'afọ 1799, ọ gara Cape of Good Hope ma jee ozi na First Cape Frontier War
nke afọ ahụ. N'afọ ahụ, a họpụtara ya onye isi-onye isi, na 12 Ọktọba.