A letter is a written message from one party to another containing information. Letters guarantee the preservation of communication between both parties. They bring friends or relatives closer together, enrich professional relationships and provide a satisfying mean of self-expression. Letters contribute to the protection and conservation of literacy, which is the ability to write and read. [1] Letters have been sent since antiquity and are mentioned in the Iliad [2] by Homer (lived around 7th or 8th centuries B.C.). Works by both Herodotus and Thucydides, also mention letters.[3]