Which accidents relievable in equity

What mistakes relievable in equity; power to relieve to be exercised cautiously. Mistake of law in instrument by contracting parties. Mistake of law in instrument by agent. When mistake of fact relieved. Form of conveyance contrary to intent. Accident or mistake in execution of power. Equitable interference not authorized by mere ignorance of law. Equitable interference not authorized by mutual ignorance of fact; mistake in judgment of value. Equitable interference not authorized by failure to exercise diligence; ignorance of fact absent fraud. Reformation and execution of contract in case of mistake distinguished. Rescission for unilateral mistake of fact. When negligent complainant granted relief. Mere volunteers, in general; exception for executed contracts. Relief against original parties or privies; exception. 23-2-56. 23-2-57. 23-2-58. 23-2-59.