The St. of 1870, o. 393, § 1, which makes defendants who are charged with crimes and offences competent witnesses, provides that their neglect or refusal to testify shall not create any presumption against them. This provision conforms to Article 12 of the Declaration of Rights, which declares that no subject shall be compelled to furnish evidence against himself. Since this class of defendants are allowed to testify if they will, there is some danger that if one exercises his right of silence, the jury will look upon it as a proper matter to weigh against him in considering the question of his guilt. It is important that courts should carefully guard his constitutional right. There is reason to apprehend that it was not guarded as it should have been in this case. For though the jury were told “ that nothing was to *412be presumed against the defendant herself for not testifying in her own behalf,” they were also told “ that the failure of a defendant to produce evidence which it was in his power to produce, to meet the evidence adduced by the- Commonwealth, was a competent and proper matter for them to weigh in considering the question of his guilt.” They were not told that this last remark did not apply to his own testimony, but merely to his failure to produce other witnesses. Nor was it otherwise qualified. The omission of every qualification might lead the jury to understand that though his neglect to testify did not raise a presumption against him, yet they might weigh the fact and allow it to have such influence as they thought it deserved. The instruction was at least equivocal, in a matter where it ought to have been clear, and we fear it operated unfavorably to the defendant.
Exceptions sustained.