The complainant, who now lives in France and does not intend to return to Australia, did not give evidence at the trial, but did make a statement to investigating police fourteen days after the events in issue. The trial judge concluded that that statement was admissible under s. 107 of the Evidence Act 1906 W.A., but exercised his discretion to exclude the statement on the basis that its prejudicial effect outweighed its probative value. Evidence was admitted, over objection, from Sarah Jane Morgan that, at about midnight on 14 March, she visited the complainant who was then alone at her home. According to Miss Morgan the complainant told her "I've been raped". It was conceded in this Court that this evidence was inadmissible. The basis of the admissibility of evidence of complaint on the trial of a sexual offence has been variously stated at different times. In Kilby v. The Queen [1] , Barwick C.J., in a judgment in which McTiernan, Stephen and Mason JJ. agreed, reviewed the various bases on which such evidence was said to be admissible and concluded that "the admissibility of that evidence in modern times can only be placed upon the consistency of statement or conduct which it tends to show, the evidence having itself no probative value as to any fact in contest but, merely and exceptionally constituting a buttress to the credit of the woman who has given evidence of having been subject to the sexual offence" [2] . On that basis, which by reason of the concession was not the subject of any debate before this Court, evidence of complaint goes merely to the credit of the complainant and it follows that such evidence is not admissible unless there is evidence from the complainant. See Kilby [3] , per Menzies J. See also Sparks v. The Queen [4] ; Whitehorn v. The Queen [5] , per Murphy J. and per Deane J. [6] .