ican Fidelity Co., 140 Conn. 572, 581. There is no Connecticut statute altering this rule, although its requirements and limitations have been further defined by the courts and rules of practice. First, to be privileged, communications between attorney and client must be confidential, i.e. must not have been divulged to or overheard by any third party. State v. Hanna, 150 Conn. 457, 466; Doyle v. Reeves, supra; Turner’s Appeal, 72 Conn. 305, 318. The burden of proving the facts essential to the privilege is on the person asserting it. McWilliams v. American Fidelity Co., supra; United States v. Kovel, 296 F.2d 918, 921. This burden includes, of course, the burden of proving the essential element that the communication was confidential. State v. Hanna, supra; 8 Wigmore, Evidence § 2311, pp. 599-600 (McNaughton Rev. 1961).
Here, however, it was undisputed that the inquiry conducted by the trial court concerned the initial consultation between the defendant and his trial counsel and that the subject of the inquiry was the trial strategy in the defense against the claims set forth against him. This clearly fell within the scope of privileged communications. The client may not be required to divulge the advice which his attorney gave him. 97 C.J.S., Witnesses, § 283. Generally, the privilege extends to whatever an attorney learned from his client in the course of preparing a case for trial. 97 C.J.S., Witnesses, § 289. The privilege, however, goes no further than is necessary to secure the client’s subjective freedom of consultation. State v. Hanna, supra. Thus, within these limits, the privilege has been extended to protect the client, not only the attorney, as was the original intent of the common-law rule: “The privilege •being for the protection of the client in his subjective freedom of consultation, it would obviously be defeated if the disclosure of the confidences,