The use of computer keyboards is robbing us of our very humanity, writes Philip Hensher in this book excerpt. Writing by hand is more personal, more immediate and far more interesting -- as long as your handwriting is legible and presentable. "Handwriting is what registers our individuality, and the mark which our culture has made on us. It has been seen as the unknowing key to our souls and our innermost nature," Hensher asserts.