76 It follows from what I have said that none of the matters to which I have referred, looked at individually, constitutes a sufficient basis for a finding that the trial judge was biased, or that he gave the appearance of it. Nor, in my opinion, can either conclusion be arrived at when all of the matters complained of are looked at together, in the context of the whole of the trial. As I have said, the trial judge was confronted by a person who was seemingly determined to delay matters as long as he could. To the limited extent that the trial judge's comments went further than was necessary, this was, and would have been understood to be, no more than an understandable expression of frustration or irritation with what was taking place. That may explain why no complaint was made in this respect by the appellant or his then counsel at any time during, or prior to, the third trial. That, of itself, is a matter of some significance. In Vakauta v Kelly [1989] HCA 44; (1989) 167 CLR 568, 572, Brennan, Deane and Gaudron JJ said: