No proof by evidence of the handwriting of the party, and of a subscribing witness, shall be taken, unless the person taking the same shall be satisfied that all the subscribing witnesses to the conveyance are dead, or cannot be had to prove the execution thereof. [14:9:1861; B § 242; BH § 2583; C § 2653; RL § 1031; NCL § 1489]
Nevada Legal Code