Acallam Bec or Agallamh Bheag ("The Little Colloquy") is the title of a medieval Irish compilation of fianaigecht tales, preserved in the fifteenth-century Book of Lismore and the Reeves manuscript. It is closely related to the Acallam na Senórach ("The Colloquy of the Elders"), of which it is sometimes considered to be a later recension.[1] It differs from it in making Oisín rather than Caílte the principal character. Douglas Hyde has suggested that the text may preserve the lost beginning of Acallam na Senórach.[2]