"32. Section 63 of the Succession Act lays down the mode and manner of execution of an unprivileged will. Section 68 of the Evidence Act postulates the mode and manner of proof of execution of document which is required by law to be attested. It in unequivocal terms states that execution of will must be proved at least by one attesting witness, if an attesting witness is alive subject to the process of the court and capable of giving evidence. A will is to prove what is loosely called as primary evidence, except where proof is permitted by leading secondary evidence. Unlike other documents, proof of execution of any other document under the Act would not be sufficient as in terms of Section 68 of the Evidence Act, execution must be proved at least by one of the attesting witnesses. While making attestation, there must be an animus attestandi, on the part of the attesting witness, meaning thereby, he must intend to attest and extrinsic evidence on this point is receivable".