It appeared to the satisfaction of the presiding justice that one of the grounds upon which the jury based their verdict for the defendants was the set-off. This opinion was warranted by the answers of the jury. Since there was evidence which in ■ his opinion was sufficient to sustain a verdict for the defendants on that ground, it is immaterial that they answered that they were also in favor of the defendants on other grounds which he thought untenable.

Judgment on the verdict.