This section is from the book "Popular Law Library Vol7 Equity Jurisprudence, Trusts, Equity Pleading", by Albert H. Putney. Also available from Amazon: Popular Law-Dictionary.
The two great equitable remedies in the case of mistake are the concellation and the correction of the contract, deed or other instrument. Which will be granted in each particular case will depend upon the circumstances of the case and the prayer in the bill of complaint. Mistake can also be set up as a defense to a bill for the specific performance of the contract, or other equitable suit.
11 Fowler vs. Black, 136 I11., 363; 26 N. E., 596.