:  page [page number] [file]
:
: start printing in the file specified at page specified
: file is assumed to be nroff ouput with page numbers in
: the format - n -
line=`grep -n -e "- $1 -" ${2-tour}`
page_loc=`expr "$line" : "\([0-9]*\)"`
tail +$page_loc ${2-tour}
