I was looking at a list of most common used letters in the English language. In order, they are: e t a o i n s r h l d c u m f p g w y b v k x j q z
For the most part, the values of the letters in Scrabble reflect this more or less, except for H. Does anyone know why H, which based on usage should clearly be worth 1 point, is valued at 4 points?