Where the contract was that if defendant by himself or through any of his agents sold the property, defendant was to give plaintiff immediate notice of that fact, the meaning, taken in connection with the admitted facts, was an actual sale and binding agreement on the finding of a purchaser by another agent than plaintiff, ready, willing and able to buy, of which fact defendant had notice, immediate notice required by the contract being notice within a reasonable time, taking into consideration the situation of the parties and all the surrounding circumstances. Tuffree v. Bienford, 130 Iowa, 532, 107 N. W. 425.