It is interesting to note that 600 years before Braille, a Syrian Muslim, known as Ali ibn Ahmed ibn Yusuf Ibn Al-Khizr Al-Amidi (d. 1314 CE) was considered an expert in reading such a system. Like Braille, he too was blind from childhood. It is a well known fact that the tactile receptors  of blind peoples' fingers are exceptionally well developed and Al-Amidi was also gifted in this 'super-sense'. It allowed him not only to locate books on shelves by the sense of touch but also enabled him to determine the number of pages of the book. He was also able to ascertain the value of the books by the spacing of the lines.
Whenever he went to buy a book he would always take with him a piece of paper. He would roll the paper into the shape of a letter of the alphabet which he would then stick onto the cover of the book. The letter used would be part of a code that he had adopted to categorize the books. At a later date by simply touching the letter he was able to identify which boo