Illustrations

• A proposes , by letter , to sell a house to B at a certain price .  The communication of the proposal is complete when B receives the letter . 
• B accepts A's proposal by a letter sent by post . The communication of the acceptance is complete - as against A , when the letter is posted ; as against B , when the letter is received by A . 
• A revokes his proposal by telegram . The revocation is complete as against A when the telegram is despatched . It is complete as against B when B receives it . 
• B revokes his acceptance by telegram .  B's revocation is complete as against B when the telegram is despatched , and as against A when it reaches him