Kammala jumla mai zuwa: Kasancewar diflomasiyyar Ostiraliya a Gabashin Timor ta fara ne daga ranar 13 ga Afrilu 1941, lokacin da aka nada Group Captain David Ross, a matsayin wakilin fasaha na Ma'aikatar Sufurin Jiragen Sama ta Australiya a Dili, babban birnin Timor na Fotigal, wanda aka ba shi aikin gudanar da hanyar jirgin ruwa na Qantas Empire Airways Flying zuwa Dili, wanda aka kafa a watan Janairun 1941. Ross kuma an ba shi izinin sirri daga Gwamnatin Ostiraliya daga 5 ga Nuwamba 1941 don yin aiki a matsayin wakilin Ostiraliya a cikin mulkin mallaka don bayar da rahoto game da duk wani al'amari da ya shafi halin da ake ciki a can. A kan shawarar Herbert Evatt, Ministan Harkokin Waje, Ross ya kuma yi aiki a matsayin Kwamishinan Birtaniya a Dili kuma daga bisani aka kama shi lokacin da sojojin Japan suka kama shi.
sun mamaye mulkin mallaka a watan Fabrairun 1942. An kafa kafa ofishin jakadancin tare da Ross a matsayin shugabanta kafin mamayewar Japan.