Department 2.
Me. Justice Burnettdelivered the opinion of the court.
1. It is first contended that the court was wrong in allowing the complaining witness to testify, she being but four years of age. It is said in Section 732, L. O. L., that the following “persons are not competent witnesses * * children under ten years of age who appear incapable of receiving just impressions of the facts respecting which they are examined, or of relating them truly; * * ”
It is settled in the case of State v. Jackson, 9 Or. 459, that the competency of a child under 10 years of age to be a witness is a preliminary question to be decided as a fact by the trial judge who has the opportunity to see and bear the witness and determine more accurately the propriety of admitting the testimony of such a witness than we can on any mere paper record. It is a principle that when there is any evidence to sustain the decision of the trial court on such a question, the appellate court will not disturb its determination: Geer v. Durham Water Co., 127 N. C. 349 (37 S. E. 474); Virginia I. C. & C. Co. v. Tomlinson, 104 Va. 249 (51 S. E. 362); American F. & F. Co. v. Settergren, 130 Wis. 338 (110 N. W. 238); Allen v. Durham Traction Co., 144 N. C. 288 (56 S. E. 942); Horne v. Consolidated Ry., Lt. & P. Co., 144 N. C. 375 (57 S. E. 19); Municipal Court v. Kirby, 28 R. I. 287 (67 Atl. 8); Yates v. Garrett, 19 Okl. 449 (92 Pac. 142); Bierce Mfg. Co. v. Phelps, 130 U. S. 520 (32 L. Ed. 1035, 9 Sup. Ct. Rep. 601).
2. Over the objection of the defendant the court permitted another female witness for the prosecution to tell of an alleged assault by the defendant with an *158intent to commit rape upon her at a time and place entirely disconnected from the transaction mentioned in the indictment. The law on this question is settled in this state adversely to the prosecution by the cases of State v. Start, 65 Or. 178 (132 Pac. 512, 46 L. R. A. (N. S.) 266), and State v. McAllister, 67 Or. 480 (136 Pac. 354). To allow such testimony is to infringe the constitutional right of the defendant to demand the nature and cause of the accusation against him. Such procedure might be palliated if there was any provision for giving the defendant notice of the other charges in such cases; but it is utterly repugnant to justice and fair play to accuse a person of a stated crime and make that the excuse for what is really trying him for a number of others by springing them unheralded upon the attention of the jury to produce a verdict of guilty which might not result except for the bias thus imparted to the minds of the jurors: State v. Dunn, 53 Or. 304, 314, 318 (99 Pac. 278, 100 Pac. 258).
3. The defendant was a witness in his own behalf, and over his objection he was compelled by the court on cross-examination to testify respecting an alleged trouble between him and a young girl in Bellingham, Washington, to which he had made no allusion whatever in his direct testimony. Section 1534, L. O. L., here follows:
“In the trial of or examination upon all indictments, complaints, informations, and other proceedings before any court, magistrate, jury, grand jury, or other tribunal, against persons accused or charged with the commission of crimes or offenses, the person so charged or accused shall, at his own request, but not otherwise, be deemed a competent witness, the credit to be given to his testimony being left solely to the jury, under the instructions of the court, or to the discrimination of the magistrate, grand jury, or other *159tribunal before which such testimony may be given; provided, his waiver of said right shall not create any presumption against him; that such defendant or accused, when offering his testimony as a witness in his own behalf, shall be deemed to have given to the prosecution a right to cross-examination upon all facts to which he has testified, tending to his conviction or acquittal."
Under this statute the ruling of the court on this question is contrary to the following cases: State v. Lurch, 12 Or. 99 (6 Pac. 408); State v. Saunders, 14 Or. 300 (12 Pac. 441); State v. Bartmess, 33 Or. 110 (54 Pac. 167); State v. Miller, 43 Or. 325 (74 Pac. 658); State v. Deal, 52 Or. 568 (98 Pac. 165); State v. Lem Woon, 57 Or. 482 (107 Pac. 974, 112 Pac. 427). While an ordinary witness may be cross-examined as this defendant was, for which State v. Bacon, 13 Or. 143 (9 Pac. 393, 57 Am. Rep. 8), and other like precedents are authority, yet the cross-examination of a defendant must be strictly confined to matters disclosed in his direct examination, subject to the qualification that he may be impeached by showing that he has been convicted of a crime, or that he has made statements inconsistent with his present testimony on material matters.
For these reasons the judgment of the Circuit Court is reversed and a new trial ordered. Reversed.
Mr. Justice Eakin and Mr. Justice Bean concur.