Where, after written authorization to brokers to negotiate an exchange of specific property was withdrawn, the brokers were orally requested to negotiate an exchange of a part of the property on different terms; held, that their services were not performed pursuant to a contract or memorandum in writing, as required by Civil Code, Sec. 1624. Fogg v. McAdam, 144 P. 296, 25 Cal. App. 522.

Under Ann. Code, Sec. 1624, where a written authorization to brokers is for an exchange of specific property, and not a general authorization to sell, it can not be modified orally. Id. Wellmyer v. Crawford, 89 N. E. 892, 48 Ind. App. 173, re. den., 93 N. E. 1051, 48 Ind. App. 173.