The Adelphoi was a wooden barque built in Sunderland, UK, that spent most of her working life in Australian waters.

The Adelphoi seems to have first made its way into Australian waters in 1874 via Java,[1] leaving Cherilbon on 1 October with a full cargo of sugar.

[7] In September 1876 it was reported that the Adelphoi and Natal Queen were loading at Lyttelton and bound for Melbourne, with 10,000 bags of oats.

[10][11][12][13] On the morning of 21 December 1879, the Adolphoi was bound from Adelaide to Newcastle when she struck a reef about a mile off Port Hacking.

[14] W H Gregory, the master of the Adelphoi, was called upon to show why his certificate should not be suspended or cancelled for his error in navigating the barque so close to land.