NOTICE! We _COULD NOT_ get the converted .dxf files to work
  properly with AutoCAD on a HPUX platform. These are provided in
  the hope someone else can make use of them.

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Mac-origs.tar.gz:
  These files are the original Mac data files (data forks only).
  gzipped tar archive.

Mac-convs.tar.gz:
  These files are the original Mac data files (data forks only),
  created with "Save As.." (or "Export"?) to either DXF or EPSF
  format.  gzipped tar archive.

Mac-EMU.sit:
  This is a Macintosh StuffIt! archive, containing all the original
  KeyCad and MacDraw Pro data files and a folder which contains the
  converted (DXF or EPFS format) data files.
  This file should be changed to Creator: "SIT!" and Type: "SITD"
  on the Macintosh.  Created and verified with StuffIt Classic.

PC-EMU.zip:
  This is a zip archive, containing the PC-format converted Mac data
  files, first saved as DXF or EPFS format on the Mac and then
  processed with "recode applemac:ibmpc" on unix, and then renamed
  to follow the MS-DOS 8:3 name convention.