These files were originally to be found in CTAN directory

  macros/plain/contrib/samples/

While there is little doubt that the author was working at Texas A&M
University, there seems to be no actual attribution, and searching the
"usual sources" has turned up nothing.

The code needs a file date.tex, whose job seems to be no more than to
typeset a date.

Robin Fairbairns

CTAN cataloguer.