The Collaborative International Dictionary of English v.0.48:

Penman \Pen"man\, n.; pl. Penmen.
   1. One who uses the pen; a writer; esp., one skilled in the
      use of the pen; a calligrapher; a writing master.
      [1913 Webster]

   2. An author; a composer. --South.
      [1913 Webster]

WordNet (r) 3.0 (2006):

penman
    n 1: informal terms for journalists [syn: scribe, scribbler,
         penman]