witness instrumentary

from Bouvier's Law Dictionary, Revised 6th Ed (1856)
WITNESS INSTRUMENTARY, Scotch law. He who has attested a deed or other 
writing. 
     2. When witnesses attest a deed without knowing the grantor, and seeing 
him subscribe, or bearing him own his subscription, and the deed happens to 
be forged, the witnesses are declared accessory to forgery. Ersk. Pr. L. 
Scot, 4, 4, 37; 6 Hill, N. Y. Rep. 303. 
    

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