( -----                                                        )

(                                                              )

( Since altering 'hash-prime' would affect previously written  )

( tables, we shall introduce the following condition: you may  )

( modify 'hash-prime' before creating hash-tables, but once    )

( this has been done, do NOT change its value afterward.       )

(                                                              )

( Of course, we could make 'hash' more flexible and have it    )

( read a prime value [or define a second word that respects a  )

( stack value for modding].  For now, let's just regard our    )

( stipulation as well justified; either tweak the provided     )

( hashing routines _before_ use, or leave them be.             )