I'd assume that you just use Storable to store an array of hash refs.

Or a hash of hash refs, if you like to retrieve them by name later.

In both cases, if you want to store hashes %a, %b, and %c with Storable, just store the compound structure instead:

use Storable;

store [ \%a, \%b, \%c] , 'file';
# or 
store { a =>  \%a, b => \%b, c => \%c} , 'file';


my $arrayref = retrieve('file'); 
my $a = $arrayref->[0];
# or
my $hashref = retrieve('file'); 
my $a = $hashref->{a};
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That works well.
Just in case anyone else needs to use this
I think that the actual hashes are found by

%aa = %{$hashref->{a}};
%bb = %{$hashref->{b}};
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Thanks to the Janaury helper monk

TMTOWTDI.

As dorward says, you can use an AoH:

my @aoh = ( \%hash_a, \%hash_b, \%hash_c );
store \@aoh, 'AoH.sto';
# ...

# elsewhere...
my $aoh = retrieve 'AoH.sto' or die "failed to retrieve stored aoh";
my $hash_c = $aoh->[ 2 ];
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my %hoh = ( a => \%hash_a, b => \%hash_b, c => \%hash_c );
store \%hoh, 'HoH.sto';
# ...

# elsewhere...
my $hoh = retrieve 'HoH.sto' or die "failed to retrieve stored hoh";
my $hash_c = $hoh->{ c };
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