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HLPLND

       SUBROUTINE  HLPLND
 C$    (Help Internal - Last Node)
 C$    Position to the last node  visited.  This is useful when  a
 C$    small excursion has been made to another node, such as by a
 C$    "Goto" or "Footnote" command,  and return to the  preceding
 C$    one is desired.   Visited nodes  are remembered  in a  ring
 C$    buffer whose  size is  set at  compile time  (the value  of
 C$    MAXRNG, currently 10).  Each  "Last" command will  position
 C$    to the next older entry on  the ring.  Once the ring  fills
 C$    up, repeated  use  of the  last  command will  simply  wrap
 C$    around the  ring  from  the oldest  to  the  newest  entry.
 C$    Implementation in a language  which allowed dynamic  memory
 C$    allocation should  instead use  a linked  list which  could
 C$    grow indefinitely.
 C$    (28-SEP-85)