The court are of opinion that these exceptions cannot be sustained.
1. The first objection taken to the ruling of the court below is, that the demandant was allowed to read his mortgage in evidence to the jury, after having proved its execution by one of the subscribing witnesses, without having called the other attesting witness, or shown any cause for omitting so to do. We do not understand that there is any inflexible rule of law, which requires that both of the subscribing witnesses to an instrument should be called and examined, in order to make legal proof of its execution. Ordinarily, it is sufficient if one is called and testifies to the due execution of the paper. 1 Greenl. Ev. § 569; 1 Phil. Ev. (4th Am. ed.) 465; Russell v. Coffin, 8 Pick. 150; Jackson v. Gager, 5 Cow. 385.
Undoubtedly there may be cases, where, on account of the failure of the recollection of one of the subscribing witnesses, or the appearance of fraud or forgery in the execution of the instrument, the court, in the exercise of its discretion, may hold the party to produce both the witnesses, or give satisfactory reasons for the absence of one of them ; but whether this shall be done or not, depends on the circumstances of each particular case, and must be decided by the judge at the trial, in the exercise of a sound discretion, to which no exception can be taken. Norris v. Freeman, 3 Wils. 38.
But in the present case, there can be no ground for complaint by the tenant, on this point, because the other subscribing witness was called by the demandant during the trial for another purpose, and thus opportunity was given to the tenant to cross-examine him in regard to all the facts and circumstances bearing on the execution of the deed.
2. The next exception is, that the tenant was not allowed to cross-examine the subscribing witness, who was called solely to prove the tenant’s signature, in regard to matters which tended to support the plea and specification of defence, until after the note and mortgage had been read in evidence. In this particular, we believe there has been some diversity of practice in the different courts of this commonwealth; the *550more common usage having been to permit a party to cross-examine his adversary’s witness, in relation to the entire case, although he was called only for formal proof. We are, however, inclined to the opinion, that the strict rule does not permit a party, who has not opened his own case, to introduce ' it. to the jury by cross-examining the witnesses of the adverse party, but that, after having opened it, he is to call them again and cross-examine upon matters material to his case. 1 Greenl. Ev. § 447.
However this may be, it is discretionary with the judge presiding at the trial, to allow either course to be adopted, and his decision on the point is not subject to revisal here. Certainly, in the case at bar, the tenant could not have been prejudiced, as he was allowed to recall the witness, and to cross-examine him at great length, upon all the facts in the ease.
3. We think the declarations and statements of De Wolf, made to the wife of the tenant, were inadmissible. They ' were not made in the presence of Miller or of Hazen, and could not bind them ; nor were they so connected with the transaction in question as to form a part of the res gestae. Whether there was sufficient proof of a conspiracy or concert between De Wolf and Hazen, to make the declarations of one competent evidence to affect the other, we cannot determine. The whole of the evidence is not reported in the exceptions, and sufficient does not appear to enable us to pass on this question. The rule is well settled, that acts and declarations of one are competent evidence as affecting another, when it is first proved that both have been engaged in a common purpose and design. But in all such cases, a foundation must be first laid py evidence, sufficient, in the opinion of the judge presiding at the trial, to establish the concert between the parties, or proper to be laid before the jury as tending to prove such fact; and this rests in the discretion of the judge, to be exercised with the utmost caution, lest the jury may be led to infer the fact of a concert or conspiracy from the declarations of strangers. We presume that the tenant in this case had failed to show to the satisfaction of the court, *551that any concert or conspiracy existed between the witness and Hazen, and for that reason the declarations of the former were rightly rejected.
It follows, that the tenant could not be permitted to contradict De Wolf as to the declarations mac e to the wife of Miller, because, having on cross-examination drawn out Ms statement of a conversation upon a matter wholly collateral, he was bound to take his answers as he gave them, and could not be allowed to contradict them by independent evidence. Underhill v. Agawam M. F. Ins. Co. 6 Cush. 440; Spenceley v. Be Willott, 7 East, 108. Exceptions overruled