tar xvzf virtualenv-16.4.1.tar.gz

  cd virtualenv-16.4.1

  python virtualenv.py ../my-python-env

  cd ..
  source my-python-env/bin/activate 

  pip install xlrd

Assuming you have downloaded the Heritage XLSX spreadsheet from their
OneDrive, you are now ready to convert the spreadsheet into the various CSV
files used to build the collection, which can be done by: 

  cd ..
  ./PREPARE.sh