Looks like it could possibly be HMCS Iris, owned by Pacific Cable Board and based in Auckland. Built 1902 and scrapped in 1952 see her for her history :-
"Iris" Built by D.J.Dunlop & Co, Glasgow 1902
Twin screw triple expansion engines of 3,120 h.p.
On trials a mean speed of 14.6 kts and a maximum of 15.25 kts were achieved.
During the maiden voyage out to Auckland the Iris ran into a hurricane between Colombo and Fremantle and was forced to hove to for several days.
As the Pacific Cable Board was constituted by Commonwealth governments the ship bore the prefix, "His Majesty's Cableship" the first ship to carry this distinction.
The "Iris" remained under the control of the Pacific Cable Board until the formation of Imperial and International Communications in 1929 when she transferred and renamed Recorder (2) and was based at Auckland and later in Singapore. Sold in 1952 and broken up at Rosyth.