Pedzisa mutsara unotevera: Muna September 1796, Johnston akagadzwa kuva mubatsiri womusasa kuna Gavhuna John Hunter, uye muna 1800 akagamuchira chinzvimbo chake chebasa somukuru. Mugore rimwe chetero Johnston akasungwa neLt. Gavhuna William Paterson achipomerwa mhosva "yekubhadhara mweya kune musoja sechikamu chemubhadharo wake uye kusateerera mirairo". Johnston akaramba kutongwa nedare rehondo mucolony, uye Hunter akamutumira kuEngland. Ikoko zvinetso zvokutonga nezvapupu muAustralia zvakatungamirira kukubviswa kwenyaya yacho, uye Johnston akadzokera kuNew South Wales muna 1802. Muna 1803 Johnston akatora mutungamiri wenguva pfupi weNew South Wales Corps panguva yekurwara kwaPaterson, uye akabatanidzwa mukukakavadzana pakati paMambo nemauto. Muna March 1804 akaita nokutsunga apo akanga ari mutungamiriri wemauto akatumwa kuzorwisa vamwe
vasungwa vakanga vapandukira paCastle Hill. Apo Paterson akatumirwa kuPort Dalrymple, Johnston akava mutungamiri weNew South Wales Corps.