Len inspired a response from Douglas Hofstadter.

-----Original Message-----
From: Don<omitted> [mailto:drecking(at)comcast(dot)net] 
Sent: Saturday, September 07, 2002 10:47 PM
To: 'dughof(at)cogsci(dot)indiana(dot)edu'
Subject: Interesting quine.....
[download]

I know you’ve probably seen many of these, but I found this wonderful Perl quine and I thought you would enjoy it.

-----Original Message-----
From: Douglas Hofstadter [mailto:dughof(at)cs(dot)indiana(dot)edu] 
Sent: Sunday, September 08, 2002 12:38 AM
To: Don<omitted>
Subject: Re: Interesting quine.....
[download]

Dear Mr. <omitted>,
As a matter of fact, I've never run into a self-replicating program that had an interesting shape, let alone such a pretty spiral. So thanks for sending it along.

All the best,
Douglas Hofstadter.