This section is from the book "American Law Of Real Estate Agency", by William Slee Walker. Also available from Amazon: American law of real estate agency.
A real estate broker authorized to sell a tract of land spoken of by the owner as being his land on a certain canal, has no authority to sell it by any other description than that by which it was purchased by the owner, and the broker's commissions are not earned where the trade falls through because the contract made by the broker with the intending purchaser described the tract as containing a stated number of acres south of the canal, whereas it was described in the conveyance to the owner as being that number of acres south of the center of the canal. Ward v. Lawrence, 70 I11. 295.
 
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