  We investigate correlations in information carriers, e.g. texts and pieces of
music, which are represented by strings of letters. For information carrying
strings generated by one source (i.e. a novel or a piece of music) we find
correlations on many length scales. The word distribution, the higher order
entropies and the transinformation are calculated. The analogy to strings
generated through symbolic dynamics by nonlinear systems in critical states is
discussed.
