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Let my servant Oliver Cowdery assist him ... in whatsoever place I shall appoint unto him, to copy, and to correct, and select, that all things may be right before me, as it shall be proved by the Spirit through him. 57:13
Trivia: What man in the Doctrine and Covenants is said to be a perfect man who looked just like his father - so much so, in fact, that they could only be distinguished by their age?