[“News and Notes”, The West Australian, Tuesday 04 October 1910, page 6]

...

The Cambridge Ethnological Expedition.—At the conclusion of his lecture at the Museum last week Mr. Alfred R. Brown; M.A., leader of the Cambridge Ethnological Expedition, announced that through the generosity of Mr. Samuel McKay, who had placed the sum of £1,000 at the disposal of the expedition, they would he enabled to spend nine months or so longer than they had originally intended in the work of anthropological research in Western Australia. Mr. Brown, however, did not explain that this was the money which Mr. McKay recently handed to Sir Edward Wittenoom to be expended in any way he thought best in the interests of the aborigines of this State. It appears that Sir Edward’s attention was directed to the expedition from Cambridge University, and he decided to hand the thousand pounds over to Mr. Brown on behalf of the donor. Sir Edward considers that Mr. McKay will be pleased to find that the money has been devoted to furthering the objects of the scientific expedition.

...

AB notes:

This helps to clarify the sequence of events regarding Sam McKay’s $$1,000 donation. There was only one donation, to be used as Sir Edward Wittenoom saw fit, and almost certainly directed to Radcliffe-Brown on the recommendation of Daisy Bates.