Rubuta ci gaba don wannan sakin layi - Gwamna John Hunter ya ba da umarnin a gina sansani kuma an ba da umarnin Fort Phillip a 1804 ta Gwamna na uku na New South Wales (a ofishin 1800 <unk> 1806), Philip Gidley King, a wani ɓangare a matsayin martani ga barazanar waje kamar yiwuwar Faransanci a 1803 kuma a wani ɓangare saboda tashin hankali na cikin gida daga 'yan tawaye masu tawaye wanda aka nuna a cikin babban tawaye na Australia kawai
a Castle Hill a watan Maris 1804. An kira wannan yaƙin na Vinegar Hill kamar yadda yawancin 'yan tawaye da aka yanke wa hukunci sune Irish. An zaɓi Windmill Hill (daga baya Observatory Hill) a matsayin wuri mai ƙarfi kamar yadda yake mafi girman matsayi a sama da mulkin mallaka, yana ba da kyawawan ra'ayoyi na tashar jiragen ruwa daga gabas da yamma, kogin da hanya zuwa Parramatta, da kewaye da ƙasa da kuma dukan garin da ke ƙasa. Ba a taba kammala sansanin ba kuma ba a taba yin harbi ba a cikin fushi.