The proof of the execution of any conveyance, whereby any real property is conveyed, or may be affected, shall be:
1. By the testimony of a subscribing witness; or
2. When all the subscribing witnesses are dead, or cannot be had, by evidence of the handwriting of the party, and of at least one subscribing witness, given by a credible witness to each signature.
[10:9:1861; B § 238; BH § 2579; C § 2649; RL § 1027; NCL § 1485]