Nelson, a bit extra as you ask
Disclaimer this is how I have it - I have read references in many different books, and not too many agree on very many things.
After Brisbane, PENSACOLA escorted some (only MEIGS and CHAUMONT of the original eight were in this convoy) ships to Torres Strait, turned back at Thursday Island, and escort duties were taken over by ;
Houston cruiser
Peary destroyer, four funnel.
Langley seaplane tender.
This convoy now goes to Darwin, having also been joined by BLOEMFONTEIN & HOLBROOK
Back to Brisbane - -
REPUBLIC went from Brisbane to Sydney, didnt go to north 26th Art Brigade HQ & 2nd Batt, 131st Field Artillery debarked REPUBLIC and embarked BLOEMFONTEIN.
The 147th and 148th Field Artillary Regiments were on HOLBROOK.
BLOEMFONTEIN & HOLBROOK departed Brisbane 28Dec41 independent of PENSACOLA, to take relief supplies to Philippines.
On reaching Torres Strait 01Jan42, orders were received to divert to Darwin, which they reached 03Jan42, escorted by HOUSTON.