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    Date: Sat, 15 Sep 90 17:10:30 EDT
    From: barmar@Think.COM

       Date: Sat, 15 Sep 90 11:14 EDT
       From: Kalman Reti <Reti@WESER.sreti.symbolics.com>

       An intermediate strategy is to store the location of the function cell
       (LOCF #'rewrite-function) and then use LOCATION-CONTENTS in conjunction with
       the APPLY or FUNCALL.  This will get the new definition when a redefinition
       occurs, but will avoid the paging overhead of having to reference the symbol
       (which is likely to be far away from the function cell).

    The function cell is *in* the symbol.
Nope, there are two function cells, one in the symbol and one with the compiled
function.  Generally, the symbol one is forwarded (via a forwarding pointer)
to the function one, at least in modern releases of Genera.