From what I can see, the Waipara left Gravesend on the 4th November 1911.
(Monday, Nov. 6, 1911
Publication: The Times)
It was at St Catherine's Point (Isle of Wight) on the 6th November 1911
(Tuesday, Nov. 7, 1911
Publication: Dundee Courier)
At Port Said on the 18th November 1911
(Monday, Nov. 20, 1911
Publication: Dundee Courier)
Arrived Thursday Island on 17th December 1911
(Wednesday, Dec. 20, 1911
Publication: The Times)
At Maryborough on the 29th December 1911
(Monday, Jan. 1, 1912
Publication: Dundee Courier)
And arrived Brisbane 2nd January 1912
(Thursday, Jan. 4, 1912
Publication: The Daily Telegraph)
Modified to add the Thursday Island arrival.