*12 Mr. Justice Stone
This case comes here on certiorari to review a ruling of the District Court for Western Washington in a criminal trial, admitting in. evidence against the accused, the petitioner here, a statement contained in a letter written by him to his wife, but. proved by the testimony of a stenographer, reading from her notes, to whom petitioner had dictated the letter and'who had transcribed it. The ruling was upheld and the conviction sustained by the Court of Appeals for the Ninth Circuit, 64 F. (2d) 566, which adopted as the test of admissibility of the evidence its interpretation of the statute in force iii the territory of Washington at the time of its admission to statehood. § 392, Code of Washington, 1881; see
State
v.
Nelson,
During the present term this Court has resolved conflicting views expressed in its earlier opinions by holding that the rules governing the competence of witnesses in criminal trials in the federal courts are not necessarily restricted to those, local rules in force at the time of the admission •into the Union of the particular state where the trial takes place, but are governed by common law principles as interpreted and, applied by the federal courts in the light of reason . and experience.
Funk
v.
United States,
The statement to which the'witness was permitted to testify in the present case was a relevant'’admission by petitioner, probative of his guilty purpose or intent to commit the crime charged. ‘It was therefore rightly received in evidence unless it should have been excluded because made in a communication to his wife.
The government insists that confidential communications between husband and wife are privileged only when the testimony offered is that- of one of the spouses, and that the privilege does not exclude proof of communications between them, however confidential, by a witness who is neither the husband nor the wife. The question thus raised remains open in the federal courts 1 But we *14 find it unnecessary to answer it here, for in the view we take the challenged testimony to the communication by the husband to his wife is not within the privilege because of the voluntary disclosure by him to a third person, his sténographer.
The basis of the immunity given to communications between husband and wife is the protection of marital confidences, regarded as so essential to the preservation of the marriage relationship as to outweigh the disadvantages to the administration of justice which the privilege entails. See
Hammons
v.
State,
Communications between the spouses, privately made, are generally assumed to have been intended to be confidential, and hence they are privileged; but wherever a communication, because of its nature or the circumstances under which it was made, was obviously not intended to be confidential it is not a privileged communication. See
Caldwell
v.
State,
Here it is suggested that the voluntary disclosure to the stenographer negatives the confidential character of the communication. Cf.
State
v.
Young,
Petitioner invokes the authority of those cases where the privilege granted to communications between attorney and client has been held to exclude proof of the communication by the testimony of a clerk present when it was made, see
Sibley
v.
Waffle,
We may assume for- present purposes that where it is the policy óf the law to throw its protection around knowledge gained or Statements made in confidence, it will find a way to make that protection effective by bringing within its scope the testimony of those whose participation in the confidence is' reasonably required. - It may be that it would be of little worth to forbid the disclosure of information gained by a physician from the examination or consultation of his patient, if the nurse, necessarily present, could reveal it. See
Culver
v.
Union Pacific R. Co., supra; Mississippi Power & Light Co.
v.
Jordan,
But it is unnecessary now to determine thé. latitude which may rightly be given to the privilege which the law confers upon either of these relationships, for no considerations such as those suggested apply to marital comniunications under conditions disclosed here. Normally husband and wife may conveniently .communicate, without-stenographic aid and the privilege of holding their conr fidences immune from proof in court may be reasonably-enjoyed and preserved without, embracing within it the
*17
testimony of third persons to whom such communications have been voluntarily revealed. The uniform ruling that communications between husband and wife, voluntarily made in the presence of their children, old enough to comprehend them, or other members of the family within the intimacy of the family circle, are not privileged,
Linnell
v.
Linnell,
We do not intimate whether in the present circumstances the wife’s testimony, not offered against her hus-^ band, would likewise be freed of the restriction. Cf.
Nash
v.
Fidelity-Phenix Fire Ins. Co.,
Affirmed.
