The Coast of Bohemia app for iPhone and iPad

In one of the old-fashioned books for children there was a story of the
adventures of a cent (or perhaps that coin of older lineage, a penny)
told by itself, which came into my mind when the publishers suggested
that the readers of a new edition of this book might like to know how
it happened to be written. I promptly fancied the book speaking, and
taking upon itself the burden of autobiography, which we none of us
find very heavy; and no sooner had I done so than I began actually to
hear from it in a narrative of much greater distinctness than I could
have supplied for it." You must surely remember," it protested to my forgetfulness, "that you first thought of me in anything like definite shape as you stood looking on at the trotting-races of a county fair in Northern Ohio, and that I began to gather color and character while you loitered through the art-building, and dwelt with pitying interest upon the forlorn, unpromising exhibits there.