When we do language change at A2, we'll come across some letters that used to be in the alphabet but aren't any more. We met one in our discussion of consonants at AS – the 'eth' symbol used for phonemic voiced 'th'. Here are some more, and the comments discussion is informative too. (Unusually for comments discussions...)
The alphabet used to have other letters -- meet two
http://hotword.dictionary.com/letters-alphabet/
The alphabet used to have other letters -- meet two
http://hotword.dictionary.com/letters-alphabet/
