The annual cold collation offers more than a little originality which is also extended to the selection of contributors. First prize goes to Avram Davidson's story of a pre-Civil war slave trader whose only chance of clearance on a murder charge lies in the Negro who can't testify; honors also to J.R. Stolper for the story of a disappearance shrouded in the religious superstition of a Bessarabian slum section, and to Alvin Pevehouse's aged but alert Dean Weathergay who refuses to reveal a ""privileged communication"" at the scene of a murder in a seminary. Chariotte Armstrong, Dorothy Salisbury Davis, Stanley Ellin, Rufus King, Hugh Peniecost alternate with less familiar names to receive the royal accolade. Good.