Discharge entire contract, §24-3-6

Enlarge time of performance, §24-3-6. Known and established usage. Admissible in aid of construction, §24-3-5. Mistake in contracts required to be in writing. Parol evidence to prove, §24-3-7. Parol evidence, §§24-3-1 to 24-3-10. Surrounding circumstances. Admissibility to aid in construction of contracts, §24-3-4. Unwritten portions. Admissible where not inconsistent, §24-3-2. Void writing.