Pigeon mail existed for a long time and until the beginning of the nineteenth century. The pigeon's amazing ability to return home has been put to good use, and in The Pigeon Post Principle you too can try out the old way of delivering letters. You will meet the cute dove Anne-Marie and help her through fifteen levels. You need to get to the mailboxes located on the roofs of the houses. Get to each box, a green checkmark should appear next to it. Once this has happened, the letter is considered delivered to The Pigeon Post Principle.
