Ka cika wannan magana: An haifi Williamson a shekara ta 1775. Ya shiga Kwalejin Soja ta Royal a Woolwich a ranar 8 ga Agusta, 1791, kuma ya sami kwamiti a matsayin laftanan na biyu a Royal Artillery a ranar 1 ga Janairu, 1794. An ba shi mukamin Laftanar, a ranar 11 ga Maris, 1794. A watan Yunin 1795, ya yi aiki a gabar tekun Faransa, a cikin balaguro zuwa Quiberon Bay don taimakawa Faransawa masu sarauta. A shekara ta 1799, ya tafi Cape of Good Hope kuma ya yi aiki a
Yaƙin Cape Frontier na farko na wannan shekarar. A wannan shekarar, an ba shi mukamin kyaftin-laftanar, a ranar 12 ga Oktoba.