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  1. or download this
    my $a; 
my $b = \$a; 
...

print \\$a;;
REF(0x3e6c980)
  2. or download this
    my $a = 'fred'; 
my $b = \$a; 
...

print $c, ' ', $$c, ' ', $$$c;;
REF(0xf5e58)   SCALAR(0x3e6c980)   fred