While Theologians thus selected traditions with a special view, thousands of
  Traditionists were busy in making collections with little or no specific
  purpose other than that of mere collection. Their object was simply to mass
  together as many traditions as they could, and for a long period they were
  guided by no fixed critical rules. Bokhâri was the first of the general
  Collectors to adopt rules of (so-called) critical selection: he proposed to
  himself the task of confining his collection to "sound" or authentic
  traditions.2 He was moved, it is said, to this duty by a dream in
  which he seemed to be driving away the flies from Mahomet, interpreted to
  signify that he would dispel the "lies" which clustered around his
  memory. The canons which guided him, however, hardly deserve the name of
  criticism. He looked simply to the completeness of